public interface IDbContext
    {
        /// <summary>
        /// 操作数据库对象
        /// </summary>
        public SqlSugarClient db { get; }

        /// <summary>
        /// 创建数据表
        /// </summary>
        /// <param name="Backup">是否备份</param>
        /// <param name="StringDefaultLength">string类型映射的长度</param>
        /// <param name="types">要创建的数据表</param>
        public void CreateTable(bool Backup = false, int StringDefaultLength = 50, params Type[] types);


        /// <summary>
        /// 创建表
        /// </summary>
        /// <param name="Backup">是否备份</param>
        /// <param name="StringDefaultLength">string类型映射的长度</param>
        public void CreateAllTable(bool Backup = false, int StringDefaultLength = 50);

    }

/// <summary>
    /// 数据库上下文
    /// </summary>
    public class AppDbContext : IDbContext
    {
        private readonly IConfiguration Configuration;
        public AppDbContext(IConfiguration configuration)
        {
            Configuration = configuration;
            //打印日志
            db.Aop.OnLogExecuting = (sql, paramster) =>
            {
                Console.WriteLine(sql + $"\r\n" +
                    $"{db.Utilities.SerializeObject(paramster.ToDictionary(it => it.ParameterName, it => it.Value))} \r\n");

            };
        }

        public AppDbContext()
        {

        }
        public SimpleClient<StudentInfo> Simple { get { return new SimpleClient<StudentInfo>(db); } }

        /// <summary>
        /// 操作数据库对象
        /// </summary>
        public SqlSugarClient db
        {
            get
            {
                return new SqlSugarClient(new ConnectionConfig()
                {
                    ConnectionString = Configuration.GetConnectionString("DefaultConnection")//连接字符串
                    ?? "server=.;database=StudentDb;uid=sa;pwd=123456;",
                    DbType = DbType.SqlServer,//数据库类型
                    IsAutoCloseConnection = true,//自动释放数据务，如果存在事务，在事务结束后释放
                    InitKeyType = InitKeyType.Attribute,//从实体特性中读取主键自增列信息
                });
            }
        }

       

        /// <summary>
        /// 创建数据表
        /// </summary>
        /// <param name="Backup">是否备份</param>
        /// <param name="StringDefaultLength">string类型映射的长度</param>
        /// <param name="types">要创建的数据表</param>
        public void CreateTable(bool Backup = false, int StringDefaultLength = 50, params Type[] types)
        {
            //设置varchar的默认长度
            db.CodeFirst.SetStringDefaultLength(StringDefaultLength);

            //创建表
            if (Backup)
            {
                db.CodeFirst.BackupTable().InitTables(types);
            }
            else
            {
                db.CodeFirst.InitTables(types);
            }



        }

        /// <summary>
        /// 创建表
        /// </summary>
        /// <param name="Backup">是否备份</param>
        /// <param name="StringDefaultLength">string类型映射的长度</param>
        public void CreateAllTable(bool Backup = false, int StringDefaultLength = 50)
        {
            //设置varchar的默认长度
            db.CodeFirst.SetStringDefaultLength(StringDefaultLength);

            Assembly assembly = Assembly.Load("SqlSugar.Model");
            Type[] types = assembly.GetTypes().Where(t => t.FullName.Contains("Models")).ToArray();

            bool b = db.DbMaintenance.CreateDatabase();
            //创建表
            if (Backup)
            {
                db.CodeFirst.BackupTable().InitTables(types);
            }
            else
            {
                db.CodeFirst.InitTables(types);
            }

        }

    }

public interface IBaseRepository<T> where T : class, new()
    {
        #region Add
        /// <summary>
        /// 增加单条数据
        /// </summary>
        /// <param name="model">实体对象</param>
        /// <returns>操作是否成功</returns>
        public Task<bool> Add(T model);

        /// <summary>
        /// 增加多条数据
        /// </summary>
        /// <param name="list">实体集合</param>
        /// <returns>操作是否成功</returns>
        public Task<bool> AddRange(List<T> list);


        /// <summary>
        /// 添加单条数据，并返回 自增列
        /// </summary>
        /// <param name="model">实体对象</param>
        /// <returns></returns>
        public Task<bool> AddReturnIdentity(T model);

        /// <summary>
        /// 增加单条数据 ，并返回 实体
        /// </summary>
        /// <param name="model">实体对象</param>
        /// <returns></returns>
        public Task<T> AddReturnEntity(T model);


        /// <summary>
        /// 只添加指定列
        /// </summary>
        /// <param name="model">实体对象</param>
        /// <param name="columns">指定要添加的列</param>
        /// <returns></returns>
        public Task<bool> AddColumns(T model, params string[] columns);


        /// <summary>
        /// 不插入指定列
        /// </summary>
        /// <param name="model">实体对象</param>
        /// <param name="IgnoreColumns">要忽略的列</param>
        /// <returns></returns>
        public Task<bool> AddColumnsByIgnoreColumns(T model, params string[] IgnoreColumns);


        #endregion

        #region Delete

        /// <summary>
        /// 根据主键删除，并返回操作是否成功
        /// </summary>
        /// <typeparam name="S">主键的类型</typeparam>
        /// <param name="key">主键</param>
        /// <returns></returns>
        public Task<bool> Delete<S>(S key);


        /// <summary>
        /// 根据主键删除，并返回操作是否成功
        /// </summary>
        /// <typeparam name="S">主键类型</typeparam>
        /// <param name="keys">主键</param>
        /// <returns></returns>
        public Task<bool> DeleteRange<S>(params S[] keys);


        /// <summary>
        /// 根据条件删除，并返回操作是否成功
        /// </summary>
        /// <param name="where">条件</param>
        /// <returns></returns>
        public Task<bool> DeleteWhere(Expression<Func<T, bool>> where);


        #endregion

        #region Update

        /// <summary>
        /// 根据主键更新 ，返回操作是否成功
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        public Task<bool> Update(T model);


        /// <summary>
        /// 根据主键更新，返回操作是否成功
        /// </summary>
        /// <param name="list">实体集合</param>
        /// <returns></returns>
        public Task<bool> UpdateRange(List<T> list);


        /// <summary>
        /// 根据指定 列条件 更新 ，并返回操作是否成功
        /// </summary>
        /// <param name="model">实体对象</param>
        /// <param name="expression">列条件 例如： t=>t.id>5 </param>
        public Task<bool> Update(T model, Expression<Func<T, object>> expression);


        /// <summary>
        /// 根据主键，更新指定列,返回操作是否成功
        /// </summary>
        /// <param name="model">实体对象</param>
        /// <param name="columns">要更新的列</param>
        /// <returns></returns>
        public Task<bool> UpdateColumns(T model, params string[] columns);


        /// <summary>
        /// 根据主键，更新指定列,返回操作是否成功
        /// </summary>
        /// <param name="model">实体对象</param>
        /// <param name="columns">要更新的列</param>
        /// <returns></returns>
        public Task<bool> UpdateColumns(T model, Expression<Func<T, object>> columns);


        /// <summary>
        /// 根据主键 ， 忽略更新指定列，返回操作是否成功
        /// </summary>
        /// <param name="model">实体对象</param>
        /// <param name="columns">不更新的 忽略列</param>
        /// <returns></returns>
        public Task<bool> UpdateColumnsByIgnoreColumns(T model, params string[] columns);


        /// <summary>
        /// 根据主键 ， 忽略更新指定列，返回操作是否成功
        /// </summary>
        /// <param name="model">实体对象</param>
        /// <param name="columns">不更新的 忽略列</param>
        /// <returns></returns>
        public Task<bool> UpdateColumnsByIgnoreColumns(T model, Expression<Func<T, object>> columns);

        /// <summary>
        /// 根据主键更新 列
        /// </summary>
        /// <param name="model">实体对象</param>
        /// <param name="ignoreAllNullColumns">是否 NULL的列不更新</param>
        /// <param name="isOffIdentity">是否忽略 自增列</param>
        /// <param name="ignoreAllDefaultValue">是否 忽略默认值列</param>
        /// <returns></returns>
        public Task<bool> UpdateNotNullColumns(T model, bool ignoreAllNullColumns, bool isOffIdentity = false, bool ignoreAllDefaultValue = false);


        //4.6.0.7 联表更新

        /// <summary>
        /// //根据不同条件执行更新不同的列 
        /// </summary>
        /// <param name="model">实体对象</param>
        /// <param name="dic">条件（key：要更新的列，value：条件是否更新此列）</param>
        /// <returns></returns>
        public Task<bool> UpdateIF(T model, Dictionary<Expression<Func<T, object>>, bool> dic);


        #endregion

        #region Query

        /// <summary>
        /// 查询所有数据
        /// </summary>
        /// <returns></returns>
        public Task<List<T>> getAll(bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc);


        /// <summary>
        /// 取前 num 条数据
        /// </summary>
        /// <param name="num">取前几条</param>
        /// <returns></returns>
        public Task<List<T>> getTakeList(int num, bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc);


        /// <summary>
        /// 获取单表 分页数据
        /// </summary>
        /// <param name="skip">跳过几条</param>
        /// <param name="take">取几条</param>
        /// <param name="whereExp">跳过几条</param>
        /// <param name="orderBy">排序条件</param>
        /// <param name="orderByType">排序类型（Asc、Desc）</param>
        /// <returns></returns>
        public Task<List<T>> getPageList(int skip, int take, Expression<Func<T, bool>> whereExp, Expression<Func<T, object>> orderBy, OrderByType orderByType = OrderByType.Asc);


        /// <summary>
        /// 获取符合条件的前 num 条数据
        /// </summary>
        /// <param name="where">条件</param>
        /// <param name="num">取前几条</param>
        /// <returns></returns> 
        public Task<List<T>> getTakeList(Expression<Func<T, bool>> where, int num, bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc);


        /// <summary>
        /// 根据主键查询
        /// </summary>
        /// <param name="pkValue">主键</param>
        /// <returns></returns>
        public Task<T> getByPrimaryKey(object pkValue);


        /// <summary>
        /// 根据条件获取 单条数据 
        /// </summary>
        /// <param name="where">条件</param>
        /// <returns></returns>
        public Task<T> getFirstOrDefault(Expression<Func<T, bool>> where);


        /// <summary>
        /// 根据主键 In  查询
        /// </summary>
        /// <typeparam name="S">主键的类型</typeparam>
        /// <param name="list">主键 In 操作的结果集</param>
        /// <returns></returns>
        public Task<List<T>> getByIn<S>(List<S> list, bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc);


        /// <summary>
        /// 根据指定列 In 查询
        /// </summary>
        /// <typeparam name="S">指定列的类型</typeparam>
        /// <param name="column">指定列</param>
        /// <param name="list">指定列 In 操作 的结果集</param>
        /// <returns></returns>
        public Task<List<T>> getByIn<S>(Expression<Func<T, object>> column, List<S> list, bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc);


        /// <summary>
        /// 根据指定列 Not In (!Contain)查询
        /// </summary>
        /// <typeparam name="S">指定列类型</typeparam>
        /// <param name="list">Not In的结果集</param>
        /// <param name="field">指定列</param>
        /// <returns></returns>
        public Task<List<T>> getByNotIn<S>(List<S> list, object field, bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc);


        /// <summary>
        /// 根据条件 查询
        /// </summary>
        /// <param name="where">条件</param>
        /// <returns></returns>
        public Task<List<T>> getByWhere(Expression<Func<T, bool>> where, bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc);


        /// <summary>
        /// 单个条件 根据 isWhere 判断 是否使用此条件进行查询
        /// </summary>
        /// <param name="isWhere">判断是否使用此查询条件的条件</param>
        /// <param name="where">查询条件</param>
        /// <returns></returns>
        public Task<List<T>> getByWhereIF(bool isWhere, Expression<Func<T, bool>> where, bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc);


        /// <summary>
        /// 多个条件 根据 wheres.value  判断是否使用 此 wheres.key 的条件
        /// </summary>
        /// <param name="wheres">查询条件</param>
        /// <returns></returns>
        public Task<List<T>> getByWhereIF(Dictionary<Expression<Func<T, bool>>, bool> wheres, bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc);


        /// <summary>
        /// 查询 指定列的值 在 start至end 之间的数据
        /// </summary>
        /// <param name="value">指定类</param>
        /// <param name="start">开始</param>
        /// <param name="end">结束</param>
        /// <returns></returns>
        public Task<List<T>> getByBetween(object value, object start, object end, bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc);


        /// <summary>
        /// 判断是否存在这条记录
        /// </summary>
        /// <param name="where">条件</param>
        /// <returns></returns>
        public Task<bool> getIsAny(Expression<Func<T, bool>> where);


        /// <summary>
        /// 单表分页查询
        /// </summary>
        /// <typeparam name="T">要查询的表</typeparam>
        /// <param name="pageIndex">页码</param>
        /// <param name="pageSize">页面容量</param>
        /// <param name="isWhere">是否需要条件查询</param>
        /// <param name="whereExp">查询条件</param>
        /// <param name="isOrderBy">是否需要排序条件</param>
        /// <param name="orderBy">排序条件</param>
        /// <param name="orderByType">排序类型（Asc、Desc）</param>
        /// <returns></returns>
        public Task<List<T>> getPageList<T>(int pageIndex, int pageSize, bool isWhere = false, Expression<Func<T, bool>> whereExp = null, bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc);


        /// <summary>
        /// 两表查询，
        /// </summary>
        /// <typeparam name="T1">左表</typeparam>
        /// <typeparam name="T2">右表</typeparam>
        /// <param name="joinExp">联表方式，联表字段（主外键关系）</param>
        /// <param name="selectExp">联表查询的结果</param>
        /// <param name="isWhere">是否需要查询条件</param>
        /// <param name="whereExp">条件查询</param>
        /// <param name="isOrderBy">是否需要排序</param>
        /// <param name="orderBy">排序条件</param>
        /// <param name="orderByType">排序类型（Asc、Desc）</param>
        /// <returns></returns>
        public Task<dynamic> getJoinList<T1, T2>(Expression<Func<T1, T2, JoinQueryInfos>> joinExp, Expression<Func<T1, T2, dynamic>> selectExp, bool isWhere = false, Expression<Func<T1, T2, bool>> whereExp = null, bool isOrderBy = false, Expression<Func<T1, T2, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc);


        /// <summary>
        /// 两表 分页查询，
        /// </summary>
        /// <typeparam name="T1">左表</typeparam>
        /// <typeparam name="T2">右表</typeparam>
        /// <param name="joinExp">联表方式，联表字段（主外键关系）</param>
        /// <param name="selectExp">联表查询的结果</param>
        /// <param name="isWhere">是否需要查询条件</param>
        /// <param name="whereExp">条件查询</param>
        /// <param name="isOrderBy">是否需要排序</param>
        /// <param name="orderBy">排序条件</param>
        /// <param name="orderByType">排序类型（Asc、Desc）</param>
        /// <returns></returns>
        public Task<dynamic> getJoinPageList<T1, T2>(int pageIndex, int pageSize, Expression<Func<T1, T2, JoinQueryInfos>> joinExp, Expression<Func<T1, T2, dynamic>> selectExp, bool isWhere = false, Expression<Func<T1, T2, bool>> whereExp = null, bool isOrderBy = false, Expression<Func<T1, T2, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc);


        /// <summary>
        /// 三表连接 查询
        /// </summary>
        /// <typeparam name="T1">表1</typeparam>
        /// <typeparam name="T2">表2</typeparam>
        /// <typeparam name="T3">表3</typeparam>
        /// <param name="joinExp">联表方式，联表字段（主外键关系）</param>
        /// <param name="selectExp">联表查询的结果</param>
        /// <param name="isWhere">是否需要查询条件</param>
        /// <param name="whereExp">查询条件</param>
        /// <param name="isOrderBy">是否需要排序条件</param>
        /// <param name="orderBy">排序条件</param>
        /// <param name="orderByType">排序类型（Asc、Desc）</param>
        /// <returns></returns>
        public Task<dynamic> getJoinList<T1, T2, T3>(Expression<Func<T1, T2, T3, JoinQueryInfos>> joinExp, Expression<Func<T1, T2, T3, dynamic>> selectExp, bool isWhere = false, Expression<Func<T1, T2, bool>> whereExp = null, bool isOrderBy = false, Expression<Func<T1, T2, T3, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc);


        /// <summary>
        /// 三表连接 分页 查询
        /// </summary>
        /// <typeparam name="T1">表1</typeparam>
        /// <typeparam name="T2">表2</typeparam>
        /// <typeparam name="T3">表3</typeparam>
        /// <param name="joinExp">联表方式，联表字段（主外键关系）</param>
        /// <param name="selectExp">联表查询的结果</param>
        /// <param name="isWhere">是否需要查询条件</param>
        /// <param name="whereExp">查询条件</param>
        /// <param name="isOrderBy">是否需要排序条件</param>
        /// <param name="orderBy">排序条件</param>
        /// <param name="orderByType">排序类型（Asc、Desc）</param>
        /// <returns></returns>
        public Task<dynamic> getJoinList<T1, T2, T3>(int pageIndex, int pageSize, Expression<Func<T1, T2, T3, JoinQueryInfos>> joinExp, Expression<Func<T1, T2, T3, dynamic>> selectExp, bool isWhere = false, Expression<Func<T1, T2, bool>> whereExp = null, bool isOrderBy = false, Expression<Func<T1, T2, T3, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc);


        /// <summary>
        /// 执行查询sql语句 ，返回数据集
        /// </summary>
        /// <param name="sql">sql语句</param>
        /// <returns></returns>
        public Task<List<T>> getListBySql(string sql);


        /// <summary>
        /// 执行非查询sql语句，返回操作是否成功
        /// </summary>
        /// <param name="sql">sql语句</param>
        /// <param name="parameters">参数化</param>
        /// <returns></returns>
        public Task<bool> ExecuteCommandSql(string sql, params SugarParameter[] parameters);


        /// <summary>
        /// 执行查询sql语句，返回查询的结果集
        /// </summary>
        /// <param name="sql">sql语句</param>
        /// <param name="parameters">参数化</param>
        /// <returns></returns>
        public Task<List<T>> getListBySqlQuery(string sql, params SugarParameter[] parameters);


        /// <summary>
        /// 执行查询sql语句，返回 第一行第一列
        /// </summary>
        /// <param name="sql">sql语句</param>
        /// <param name="parameters">参数化</param>
        /// <returns></returns>
        public Task<object> getScalar(string sql, params SugarParameter[] parameters);



        #endregion

        #region Other


        /// <summary>
        /// 使用存储过程，返回结果集
        /// </summary>
        /// <param name="procedureName">存储过程名称 </param>
        /// <param name="parameters">参数，支持 output</param>
        /// <returns></returns>
        public Task<DataTable> UseStoredProcedure(string procedureName, params SugarParameter[] parameters);


        /// <summary>
        /// 使用事务 ，无返回值
        /// </summary>
        /// <param name="action">执行动作</param>
        /// <param name="errorCallBack">错误回调</param>
        public Task<DbResult<bool>> UseTran(Action action, Action<Exception> errorCallBack);


        /// <summary>
        /// 使用事务，有返回值
        /// </summary>
        /// <typeparam name="S">返回值类型</typeparam>
        /// <param name="func">执行动作</param>
        /// <param name="errorCallBack">错误回调</param>
        public Task<DbResult<S>> UseTran<S>(Func<S> func, Action<Exception> errorCallBack);


        #endregion
    }

public class BaseRepository<T> : IBaseRepository<T> where T : class, new()
    {
        private readonly IDbContext context;
        public BaseRepository(IDbContext dbContext)
        {
            context = dbContext;
        }

        #region Add
        /// <summary>
        /// 增加单条数据
        /// </summary>
        /// <param name="model">实体对象</param>
        /// <returns>操作是否成功</returns>
        public async Task<bool> Add(T model)
        {
            return await context.db.Insertable<T>(model).ExecuteCommandAsync() > 0;
        }

        /// <summary>
        /// 增加多条数据
        /// </summary>
        /// <param name="list">实体集合</param>
        /// <returns>操作是否成功</returns>
        public async Task<bool> AddRange(List<T> list)
        {
            return await context.db.Insertable<T>(list).ExecuteCommandAsync() > 0;
        }

        /// <summary>
        /// 添加单条数据，并返回 自增列
        /// </summary>
        /// <param name="model">实体对象</param>
        /// <returns></returns>
        public async Task<bool> AddReturnIdentity(T model)
        {
            return await context.db.Insertable<T>(model).ExecuteReturnIdentityAsync() > 0;//ExecuteReturnBigIdentity();//4.5.0.2 +  long
        }

        /// <summary>
        /// 增加单条数据 ，并返回 实体
        /// </summary>
        /// <param name="model">实体对象</param>
        /// <returns></returns>
        public async Task<T> AddReturnEntity(T model)
        {
            return await context.db.Insertable<T>(model).ExecuteReturnEntityAsync();
        }

        /// <summary>
        /// 只添加指定列
        /// </summary>
        /// <param name="model">实体对象</param>
        /// <param name="columns">指定要添加的列</param>
        /// <returns></returns>
        public async Task<bool> AddColumns(T model, params string[] columns)
        {
            return await context.db.Insertable<T>(model).InsertColumns(columns).ExecuteCommandAsync() > 0;
        }

        /// <summary>
        /// 不插入指定列
        /// </summary>
        /// <param name="model">实体对象</param>
        /// <param name="IgnoreColumns">要忽略的列</param>
        /// <returns></returns>
        public async Task<bool> AddColumnsByIgnoreColumns(T model, params string[] IgnoreColumns)
        {
            return await context.db.Insertable<T>(model)
                .IgnoreColumns(IgnoreColumns).ExecuteCommandAsync() > 0;
        }

        #endregion

        #region Delete

        /// <summary>
        /// 根据主键删除，并返回操作是否成功
        /// </summary>
        /// <typeparam name="S">主键的类型</typeparam>
        /// <param name="key">主键</param>
        /// <returns></returns>
        public async Task<bool> Delete<S>(S key)
        {
            return await context.db.Deleteable<T>().In(key).ExecuteCommandAsync() > 0;
        }

        /// <summary>
        /// 根据主键删除，并返回操作是否成功
        /// </summary>
        /// <typeparam name="S">主键类型</typeparam>
        /// <param name="keys">主键</param>
        /// <returns></returns>
        public async Task<bool> DeleteRange<S>(params S[] keys)
        {
            return await context.db.Deleteable<T>().In(keys).ExecuteCommandAsync() > 0;
        }

        /// <summary>
        /// 根据条件删除，并返回操作是否成功
        /// </summary>
        /// <param name="where">条件</param>
        /// <returns></returns>
        public async Task<bool> DeleteWhere(Expression<Func<T, bool>> where)
        {
            return await context.db.Deleteable<T>().Where(where).ExecuteCommandAsync() > 0;
        }

        #endregion

        #region Update

        /// <summary>
        /// 根据主键更新 ，返回操作是否成功
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        public async Task<bool> Update(T model)
        {
            return await context.db.Updateable<T>(model).ExecuteCommandAsync() > 0;
        }

        /// <summary>
        /// 根据主键更新，返回操作是否成功
        /// </summary>
        /// <param name="list">实体集合</param>
        /// <returns></returns>
        public async Task<bool> UpdateRange(List<T> list)
        {
            return await context.db.Updateable<T>(list).ExecuteCommandAsync() > 0;
        }

        /// <summary>
        /// 根据指定 列条件 更新 ，并返回操作是否成功
        /// </summary>
        /// <param name="model">实体对象</param>
        /// <param name="expression">列条件 例如： t=>t.id>5 </param>
        public async Task<bool> Update(T model, Expression<Func<T, object>> expression)
        {
            return await context.db.Updateable<T>(model).WhereColumns(expression).ExecuteCommandAsync() > 0;
        }

        /// <summary>
        /// 根据主键，更新指定列,返回操作是否成功
        /// </summary>
        /// <param name="model">实体对象</param>
        /// <param name="columns">要更新的列</param>
        /// <returns></returns>
        public async Task<bool> UpdateColumns(T model, params string[] columns)
        {
            return await context.db.Updateable<T>(model).UpdateColumns(columns).ExecuteCommandAsync() > 0;
        }

        /// <summary>
        /// 根据主键，更新指定列,返回操作是否成功
        /// </summary>
        /// <param name="model">实体对象</param>
        /// <param name="columns">要更新的列</param>
        /// <returns></returns>
        public async Task<bool> UpdateColumns(T model, Expression<Func<T, object>> columns)
        {
            return await context.db.Updateable<T>(model).UpdateColumns(columns).ExecuteCommandAsync() > 0;
        }

        /// <summary>
        /// 根据主键 ， 忽略更新指定列，返回操作是否成功
        /// </summary>
        /// <param name="model">实体对象</param>
        /// <param name="columns">不更新的 忽略列</param>
        /// <returns></returns>
        public async Task<bool> UpdateColumnsByIgnoreColumns(T model, params string[] columns)
        {
            return await context.db.Updateable<T>(model).IgnoreColumns(columns).ExecuteCommandAsync() > 0;
        }

        /// <summary>
        /// 根据主键 ， 忽略更新指定列，返回操作是否成功
        /// </summary>
        /// <param name="model">实体对象</param>
        /// <param name="columns">不更新的 忽略列</param>
        /// <returns></returns>
        public async Task<bool> UpdateColumnsByIgnoreColumns(T model, Expression<Func<T, object>> columns)
        {
            return await context.db.Updateable<T>(model).IgnoreColumns(columns).ExecuteCommandAsync() > 0;
        }

        /// <summary>
        /// 根据主键更新 列
        /// </summary>
        /// <param name="model">实体对象</param>
        /// <param name="ignoreAllNullColumns">是否 NULL的列不更新</param>
        /// <param name="isOffIdentity">是否忽略 自增列</param>
        /// <param name="ignoreAllDefaultValue">是否 忽略默认值列</param>
        /// <returns></returns>
        public async Task<bool> UpdateNotNullColumns(T model, bool ignoreAllNullColumns, bool isOffIdentity = false, bool ignoreAllDefaultValue = false)
        {
            return await context.db.Updateable<T>()
                .IgnoreColumns(ignoreAllNullColumns: true, isOffIdentity: false, ignoreAllDefaultValue: false)
                .ExecuteCommandAsync() > 0;
        }

        //4.6.0.7 联表更新

        /// <summary>
        /// //根据不同条件执行更新不同的列 
        /// </summary>
        /// <param name="model">实体对象</param>
        /// <param name="dic">条件（key：要更新的列，value：条件是否更新此列）</param>
        /// <returns></returns>
        public async Task<bool> UpdateIF(T model, Dictionary<Expression<Func<T, object>>, bool> dic)
        {
            var able = context.db.Updateable<T>(model);
            foreach (var item in dic)
            {
                able.UpdateColumnsIF(item.Value, item.Key);// s=>s.name  ture
            }

            return await able.ExecuteCommandAsync() > 0;
        }

        #endregion

        #region Query

        /// <summary>
        /// 查询所有数据
        /// </summary>
        /// <returns></returns>
        public async Task<List<T>> getAll(bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc)
        {
            return await context.db.Queryable<T>().OrderByIF(isOrderBy, orderBy, orderByType).ToListAsync();
        }

        /// <summary>
        /// 取前 num 条数据
        /// </summary>
        /// <param name="num">取前几条</param>
        /// <returns></returns>
        public async Task<List<T>> getTakeList(int num, bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc)
        {
            return await context.db.Queryable<T>().OrderByIF(isOrderBy, orderBy, orderByType).Take(num).ToListAsync();
        }

        /// <summary>
        /// 获取单表 分页数据
        /// </summary>
        /// <param name="skip">跳过几条</param>
        /// <param name="take">取几条</param>
        /// <param name="whereExp">跳过几条</param>
        /// <param name="orderBy">排序条件</param>
        /// <param name="orderByType">排序类型（Asc、Desc）</param>
        /// <returns></returns>
        public async Task<List<T>> getPageList(int skip, int take, Expression<Func<T, bool>> whereExp, Expression<Func<T, object>> orderBy, OrderByType orderByType = OrderByType.Asc)
        {
            return await context.db.Queryable<T>().Skip(skip).Take(take).OrderBy(orderBy, orderByType).ToListAsync();
        }

        /// <summary>
        /// 获取符合条件的前 num 条数据
        /// </summary>
        /// <param name="where">条件</param>
        /// <param name="num">取前几条</param>
        /// <returns></returns> 
        public async Task<List<T>> getTakeList(Expression<Func<T, bool>> where, int num, bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc)
        {
            return await context.db.Queryable<T>().Where(where).OrderByIF(isOrderBy, orderBy, orderByType).Take(num).ToListAsync();
        }

        /// <summary>
        /// 根据主键查询
        /// </summary>
        /// <param name="pkValue">主键</param>
        /// <returns></returns>
        public async Task<T> getByPrimaryKey(object pkValue)
        {
            return await context.db.Queryable<T>().InSingleAsync(pkValue);
        }

        /// <summary>
        /// 根据条件获取 单条数据 
        /// </summary>
        /// <param name="where">条件</param>
        /// <returns></returns>
        public async Task<T> getFirstOrDefault(Expression<Func<T, bool>> where)
        {
            return await context.db.Queryable<T>().FirstAsync(where);//查询单条没有数据返回NULL, Single超过1条会报错，First不会
        }

        /// <summary>
        /// 根据主键 In  查询
        /// </summary>
        /// <typeparam name="S">主键的类型</typeparam>
        /// <param name="list">主键 In 操作的结果集</param>
        /// <returns></returns>
        public async Task<List<T>> getByIn<S>(List<S> list, bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc)
        {
            return await context.db.Queryable<T>().In<S>(list).OrderByIF(isOrderBy, orderBy, orderByType).ToListAsync();
        }

        /// <summary>
        /// 根据指定列 In 查询
        /// </summary>
        /// <typeparam name="S">指定列的类型</typeparam>
        /// <param name="column">指定列</param>
        /// <param name="list">指定列 In 操作 的结果集</param>
        /// <returns></returns>
        public async Task<List<T>> getByIn<S>(Expression<Func<T, object>> column, List<S> list, bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc)
        {
            return await context.db.Queryable<T>().In<S>(column, list).OrderByIF(isOrderBy, orderBy, orderByType).ToListAsync();
        }

        /// <summary>
        /// 根据指定列 Not In (!Contain)查询
        /// </summary>
        /// <typeparam name="S">指定列类型</typeparam>
        /// <param name="list">Not In的结果集</param>
        /// <param name="field">指定列</param>
        /// <returns></returns>
        public async Task<List<T>> getByNotIn<S>(List<S> list, object field, bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc)
        {
            return await context.db.Queryable<T>().Where(t => !SqlFunc.ContainsArray(list, field)).OrderByIF(isOrderBy, orderBy, orderByType).ToListAsync();
        }

        /// <summary>
        /// 根据条件 查询
        /// </summary>
        /// <param name="where">条件</param>
        /// <returns></returns>
        public async Task<List<T>> getByWhere(Expression<Func<T, bool>> where, bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc)
        {
            return await context.db.Queryable<T>().Where(where).OrderByIF(isOrderBy, orderBy, orderByType).ToListAsync();
        }

        /// <summary>
        /// 单个条件 根据 isWhere 判断 是否使用此条件进行查询
        /// </summary>
        /// <param name="isWhere">判断是否使用此查询条件的条件</param>
        /// <param name="where">查询条件</param>
        /// <returns></returns>
        public async Task<List<T>> getByWhereIF(bool isWhere, Expression<Func<T, bool>> where, bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc)
        {
            return await context.db.Queryable<T>().WhereIF(isWhere, where).OrderByIF(isOrderBy, orderBy, orderByType).ToListAsync();
        }

        /// <summary>
        /// 多个条件 根据 wheres.value  判断是否使用 此 wheres.key 的条件
        /// </summary>
        /// <param name="wheres">查询条件</param>
        /// <returns></returns>
        public async Task<List<T>> getByWhereIF(Dictionary<Expression<Func<T, bool>>, bool> wheres, bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc)
        {
            var able = context.db.Queryable<T>();
            foreach (var item in wheres)
            {
                able.WhereIF(item.Value, item.Key);
            }
            return await able.OrderByIF(isOrderBy, orderBy, orderByType).ToListAsync();
        }

        /// <summary>
        /// 查询 指定列的值 在 start至end 之间的数据
        /// </summary>
        /// <param name="value">指定类</param>
        /// <param name="start">开始</param>
        /// <param name="end">结束</param>
        /// <returns></returns>
        public async Task<List<T>> getByBetween(object value, object start, object end, bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc)
        {
            return await context.db.Queryable<T>().Where(it => SqlFunc.Between(value, start, end)).OrderByIF(isOrderBy, orderBy, orderByType).ToListAsync();
        }

        /// <summary>
        /// 判断是否存在这条记录
        /// </summary>
        /// <param name="where">条件</param>
        /// <returns></returns>
        public async Task<bool> getIsAny(Expression<Func<T, bool>> where)
        {
            return await context.db.Queryable<T>().AnyAsync(where);
        }

        /// <summary>
        /// 单表分页查询
        /// </summary>
        /// <typeparam name="T">要查询的表</typeparam>
        /// <param name="pageIndex">页码</param>
        /// <param name="pageSize">页面容量</param>
        /// <param name="isWhere">是否需要条件查询</param>
        /// <param name="whereExp">查询条件</param>
        /// <param name="isOrderBy">是否需要排序条件</param>
        /// <param name="orderBy">排序条件</param>
        /// <param name="orderByType">排序类型（Asc、Desc）</param>
        /// <returns></returns>
        public async Task<List<T>> getPageList<T>(int pageIndex, int pageSize, bool isWhere = false, Expression<Func<T, bool>> whereExp = null, bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc)
        {
            return await context.db.Queryable<T>().WhereIF(isWhere, whereExp).OrderByIF(isOrderBy, orderBy).ToPageListAsync(pageIndex, pageSize);
        }

        /// <summary>
        /// 两表查询，
        /// </summary>
        /// <typeparam name="T1">左表</typeparam>
        /// <typeparam name="T2">右表</typeparam>
        /// <param name="joinExp">联表方式，联表字段（主外键关系）</param>
        /// <param name="selectExp">联表查询的结果</param>
        /// <param name="isWhere">是否需要查询条件</param>
        /// <param name="whereExp">条件查询</param>
        /// <param name="isOrderBy">是否需要排序</param>
        /// <param name="orderBy">排序条件</param>
        /// <param name="orderByType">排序类型（Asc、Desc）</param>
        /// <returns></returns>
        public async Task<dynamic> getJoinList<T1, T2>(Expression<Func<T1, T2, JoinQueryInfos>> joinExp, Expression<Func<T1, T2, dynamic>> selectExp, bool isWhere = false, Expression<Func<T1, T2, bool>> whereExp = null, bool isOrderBy = false, Expression<Func<T1, T2, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc)
        {

            return await context.db.Queryable<T1, T2>(joinExp).WhereIF(isWhere, whereExp)
                .OrderByIF(isOrderBy, orderBy).Select(selectExp).ToListAsync();
        }

        /// <summary>
        /// 两表 分页查询，
        /// </summary>
        /// <typeparam name="T1">左表</typeparam>
        /// <typeparam name="T2">右表</typeparam>
        /// <param name="joinExp">联表方式，联表字段（主外键关系）</param>
        /// <param name="selectExp">联表查询的结果</param>
        /// <param name="isWhere">是否需要查询条件</param>
        /// <param name="whereExp">条件查询</param>
        /// <param name="isOrderBy">是否需要排序</param>
        /// <param name="orderBy">排序条件</param>
        /// <param name="orderByType">排序类型（Asc、Desc）</param>
        /// <returns></returns>
        public async Task<dynamic> getJoinPageList<T1, T2>(int pageIndex, int pageSize, Expression<Func<T1, T2, JoinQueryInfos>> joinExp, Expression<Func<T1, T2, dynamic>> selectExp, bool isWhere = false, Expression<Func<T1, T2, bool>> whereExp = null, bool isOrderBy = false, Expression<Func<T1, T2, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc)
        {

            return await context.db.Queryable<T1, T2>(joinExp).WhereIF(isWhere, whereExp)
                .OrderByIF(isOrderBy, orderBy).Select(selectExp).ToPageListAsync(pageIndex, pageSize);
        }

        /// <summary>
        /// 三表连接 查询
        /// </summary>
        /// <typeparam name="T1">表1</typeparam>
        /// <typeparam name="T2">表2</typeparam>
        /// <typeparam name="T3">表3</typeparam>
        /// <param name="joinExp">联表方式，联表字段（主外键关系）</param>
        /// <param name="selectExp">联表查询的结果</param>
        /// <param name="isWhere">是否需要查询条件</param>
        /// <param name="whereExp">查询条件</param>
        /// <param name="isOrderBy">是否需要排序条件</param>
        /// <param name="orderBy">排序条件</param>
        /// <param name="orderByType">排序类型（Asc、Desc）</param>
        /// <returns></returns>
        public async Task<dynamic> getJoinList<T1, T2, T3>(Expression<Func<T1, T2, T3, JoinQueryInfos>> joinExp, Expression<Func<T1, T2, T3, dynamic>> selectExp, bool isWhere = false, Expression<Func<T1, T2, bool>> whereExp = null, bool isOrderBy = false, Expression<Func<T1, T2, T3, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc)
        {
            return await context.db.Queryable<T1, T2, T3>(joinExp).WhereIF(isWhere, whereExp).OrderByIF(isOrderBy, orderBy).Select(selectExp).ToListAsync();
        }

        /// <summary>
        /// 三表连接 分页 查询
        /// </summary>
        /// <typeparam name="T1">表1</typeparam>
        /// <typeparam name="T2">表2</typeparam>
        /// <typeparam name="T3">表3</typeparam>
        /// <param name="joinExp">联表方式，联表字段（主外键关系）</param>
        /// <param name="selectExp">联表查询的结果</param>
        /// <param name="isWhere">是否需要查询条件</param>
        /// <param name="whereExp">查询条件</param>
        /// <param name="isOrderBy">是否需要排序条件</param>
        /// <param name="orderBy">排序条件</param>
        /// <param name="orderByType">排序类型（Asc、Desc）</param>
        /// <returns></returns>
        public async Task<dynamic> getJoinList<T1, T2, T3>(int pageIndex, int pageSize, Expression<Func<T1, T2, T3, JoinQueryInfos>> joinExp, Expression<Func<T1, T2, T3, dynamic>> selectExp, bool isWhere = false, Expression<Func<T1, T2, bool>> whereExp = null, bool isOrderBy = false, Expression<Func<T1, T2, T3, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc)
        {
            return await context.db.Queryable<T1, T2, T3>(joinExp).WhereIF(isWhere, whereExp).OrderByIF(isOrderBy, orderBy)
                .Select(selectExp).ToPageListAsync(pageIndex, pageSize);
        }

        /// <summary>
        /// 执行查询sql语句 ，返回数据集
        /// </summary>
        /// <param name="sql">sql语句</param>
        /// <returns></returns>
        public async Task<List<T>> getListBySql(string sql)
        {
            return await context.db.SqlQueryable<T>(sql).ToListAsync();
        }

        /// <summary>
        /// 执行非查询sql语句，返回操作是否成功
        /// </summary>
        /// <param name="sql">sql语句</param>
        /// <param name="parameters">参数化</param>
        /// <returns></returns>
        public async Task<bool> ExecuteCommandSql(string sql, params SugarParameter[] parameters)
        {
            return await context.db.Ado.ExecuteCommandAsync(sql, parameters) > 0;
        }

        /// <summary>
        /// 执行查询sql语句，返回查询的结果集
        /// </summary>
        /// <param name="sql">sql语句</param>
        /// <param name="parameters">参数化</param>
        /// <returns></returns>
        public async Task<List<T>> getListBySqlQuery(string sql, params SugarParameter[] parameters)
        {
            return await context.db.Ado.SqlQueryAsync<T>(sql, parameters);
        }

        /// <summary>
        /// 执行查询sql语句，返回 第一行第一列
        /// </summary>
        /// <param name="sql">sql语句</param>
        /// <param name="parameters">参数化</param>
        /// <returns></returns>
        public async Task<object> getScalar(string sql, params SugarParameter[] parameters)
        {
            return await context.db.Ado.GetScalarAsync(sql, parameters);
        }


        #endregion

        #region Other


        /// <summary>
        /// 使用存储过程，返回结果集
        /// </summary>
        /// <param name="procedureName">存储过程名称 </param>
        /// <param name="parameters">参数，支持 output</param>
        /// <returns></returns>
        public async Task<DataTable> UseStoredProcedure(string procedureName, params SugarParameter[] parameters)
        {
            return await context.db.Ado.UseStoredProcedure().GetDataTableAsync(procedureName, parameters);
        }

        /// <summary>
        /// 使用事务 ，无返回值
        /// </summary>
        /// <param name="action">执行动作</param>
        /// <param name="errorCallBack">错误回调</param>
        public async Task<DbResult<bool>> UseTran(Action action, Action<Exception> errorCallBack)
        {
            return await context.db.Ado.UseTranAsync(action, errorCallBack); ;
        }

        /// <summary>
        /// 使用事务，有返回值
        /// </summary>
        /// <typeparam name="S">返回值类型</typeparam>
        /// <param name="func">执行动作</param>
        /// <param name="errorCallBack">错误回调</param>
        public async Task<DbResult<S>> UseTran<S>(Func<S> func, Action<Exception> errorCallBack)
        {
            return await context.db.Ado.UseTranAsync(func, errorCallBack);
        }

        #endregion



    }

public interface IStudentInfoRepository : IBaseRepository<StudentInfo>
    {

    }

public class StudentInfoRepository : BaseRepository<StudentInfo>, IStudentInfoRepository
    {
        private readonly IDbContext context;
        public StudentInfoRepository(IDbContext dbContext)
            : base(dbContext)
        {
            context = dbContext;

        }

    }

public interface IBaseService<T> where T : class, new()
    {
        #region Add
        /// <summary>
        /// 增加单条数据
        /// </summary>
        /// <param name="model">实体对象</param>
        /// <returns>操作是否成功</returns>
        public Task<bool> Add(T model);

        /// <summary>
        /// 增加多条数据
        /// </summary>
        /// <param name="list">实体集合</param>
        /// <returns>操作是否成功</returns>
        public Task<bool> AddRange(List<T> list);


        /// <summary>
        /// 添加单条数据，并返回 自增列
        /// </summary>
        /// <param name="model">实体对象</param>
        /// <returns></returns>
        public Task<bool> AddReturnIdentity(T model);

        /// <summary>
        /// 增加单条数据 ，并返回 实体
        /// </summary>
        /// <param name="model">实体对象</param>
        /// <returns></returns>
        public Task<T> AddReturnEntity(T model);


        /// <summary>
        /// 只添加指定列
        /// </summary>
        /// <param name="model">实体对象</param>
        /// <param name="columns">指定要添加的列</param>
        /// <returns></returns>
        public Task<bool> AddColumns(T model, params string[] columns);


        /// <summary>
        /// 不插入指定列
        /// </summary>
        /// <param name="model">实体对象</param>
        /// <param name="IgnoreColumns">要忽略的列</param>
        /// <returns></returns>
        public Task<bool> AddColumnsByIgnoreColumns(T model, params string[] IgnoreColumns);


        #endregion

        #region Delete

        /// <summary>
        /// 根据主键删除，并返回操作是否成功
        /// </summary>
        /// <typeparam name="S">主键的类型</typeparam>
        /// <param name="key">主键</param>
        /// <returns></returns>
        public Task<bool> Delete<S>(S key);


        /// <summary>
        /// 根据主键删除，并返回操作是否成功
        /// </summary>
        /// <typeparam name="S">主键类型</typeparam>
        /// <param name="keys">主键</param>
        /// <returns></returns>
        public Task<bool> DeleteRange<S>(params S[] keys);


        /// <summary>
        /// 根据条件删除，并返回操作是否成功
        /// </summary>
        /// <param name="where">条件</param>
        /// <returns></returns>
        public Task<bool> DeleteWhere(Expression<Func<T, bool>> where);


        #endregion

        #region Update

        /// <summary>
        /// 根据主键更新 ，返回操作是否成功
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        public Task<bool> Update(T model);


        /// <summary>
        /// 根据主键更新，返回操作是否成功
        /// </summary>
        /// <param name="list">实体集合</param>
        /// <returns></returns>
        public Task<bool> UpdateRange(List<T> list);


        /// <summary>
        /// 根据指定 列条件 更新 ，并返回操作是否成功
        /// </summary>
        /// <param name="model">实体对象</param>
        /// <param name="expression">列条件 例如： t=>t.id>5 </param>
        public Task<bool> Update(T model, Expression<Func<T, object>> expression);


        /// <summary>
        /// 根据主键，更新指定列,返回操作是否成功
        /// </summary>
        /// <param name="model">实体对象</param>
        /// <param name="columns">要更新的列</param>
        /// <returns></returns>
        public Task<bool> UpdateColumns(T model, params string[] columns);


        /// <summary>
        /// 根据主键，更新指定列,返回操作是否成功
        /// </summary>
        /// <param name="model">实体对象</param>
        /// <param name="columns">要更新的列</param>
        /// <returns></returns>
        public Task<bool> UpdateColumns(T model, Expression<Func<T, object>> columns);


        /// <summary>
        /// 根据主键 ， 忽略更新指定列，返回操作是否成功
        /// </summary>
        /// <param name="model">实体对象</param>
        /// <param name="columns">不更新的 忽略列</param>
        /// <returns></returns>
        public Task<bool> UpdateColumnsByIgnoreColumns(T model, params string[] columns);


        /// <summary>
        /// 根据主键 ， 忽略更新指定列，返回操作是否成功
        /// </summary>
        /// <param name="model">实体对象</param>
        /// <param name="columns">不更新的 忽略列</param>
        /// <returns></returns>
        public Task<bool> UpdateColumnsByIgnoreColumns(T model, Expression<Func<T, object>> columns);

        /// <summary>
        /// 根据主键更新 列
        /// </summary>
        /// <param name="model">实体对象</param>
        /// <param name="ignoreAllNullColumns">是否 NULL的列不更新</param>
        /// <param name="isOffIdentity">是否忽略 自增列</param>
        /// <param name="ignoreAllDefaultValue">是否 忽略默认值列</param>
        /// <returns></returns>
        public Task<bool> UpdateNotNullColumns(T model, bool ignoreAllNullColumns, bool isOffIdentity = false, bool ignoreAllDefaultValue = false);


        //4.6.0.7 联表更新

        /// <summary>
        /// //根据不同条件执行更新不同的列 
        /// </summary>
        /// <param name="model">实体对象</param>
        /// <param name="dic">条件（key：要更新的列，value：条件是否更新此列）</param>
        /// <returns></returns>
        public Task<bool> UpdateIF(T model, Dictionary<Expression<Func<T, object>>, bool> dic);


        #endregion

        #region Query

        /// <summary>
        /// 查询所有数据
        /// </summary>
        /// <returns></returns>
        public Task<List<T>> getAll(bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc);


        /// <summary>
        /// 取前 num 条数据
        /// </summary>
        /// <param name="num">取前几条</param>
        /// <returns></returns>
        public Task<List<T>> getTakeList(int num, bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc);


        /// <summary>
        /// 获取单表 分页数据
        /// </summary>
        /// <param name="skip">跳过几条</param>
        /// <param name="take">取几条</param>
        /// <param name="whereExp">跳过几条</param>
        /// <param name="orderBy">排序条件</param>
        /// <param name="orderByType">排序类型（Asc、Desc）</param>
        /// <returns></returns>
        public Task<List<T>> getPageList(int skip, int take, Expression<Func<T, bool>> whereExp, Expression<Func<T, object>> orderBy, OrderByType orderByType = OrderByType.Asc);


        /// <summary>
        /// 获取符合条件的前 num 条数据
        /// </summary>
        /// <param name="where">条件</param>
        /// <param name="num">取前几条</param>
        /// <returns></returns> 
        public Task<List<T>> getTakeList(Expression<Func<T, bool>> where, int num, bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc);


        /// <summary>
        /// 根据主键查询
        /// </summary>
        /// <param name="pkValue">主键</param>
        /// <returns></returns>
        public Task<T> getByPrimaryKey(object pkValue);


        /// <summary>
        /// 根据条件获取 单条数据 
        /// </summary>
        /// <param name="where">条件</param>
        /// <returns></returns>
        public Task<T> getFirstOrDefault(Expression<Func<T, bool>> where);


        /// <summary>
        /// 根据主键 In  查询
        /// </summary>
        /// <typeparam name="S">主键的类型</typeparam>
        /// <param name="list">主键 In 操作的结果集</param>
        /// <returns></returns>
        public Task<List<T>> getByIn<S>(List<S> list, bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc);


        /// <summary>
        /// 根据指定列 In 查询
        /// </summary>
        /// <typeparam name="S">指定列的类型</typeparam>
        /// <param name="column">指定列</param>
        /// <param name="list">指定列 In 操作 的结果集</param>
        /// <returns></returns>
        public Task<List<T>> getByIn<S>(Expression<Func<T, object>> column, List<S> list, bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc);


        /// <summary>
        /// 根据指定列 Not In (!Contain)查询
        /// </summary>
        /// <typeparam name="S">指定列类型</typeparam>
        /// <param name="list">Not In的结果集</param>
        /// <param name="field">指定列</param>
        /// <returns></returns>
        public Task<List<T>> getByNotIn<S>(List<S> list, object field, bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc);


        /// <summary>
        /// 根据条件 查询
        /// </summary>
        /// <param name="where">条件</param>
        /// <returns></returns>
        public Task<List<T>> getByWhere(Expression<Func<T, bool>> where, bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc);


        /// <summary>
        /// 单个条件 根据 isWhere 判断 是否使用此条件进行查询
        /// </summary>
        /// <param name="isWhere">判断是否使用此查询条件的条件</param>
        /// <param name="where">查询条件</param>
        /// <returns></returns>
        public Task<List<T>> getByWhereIF(bool isWhere, Expression<Func<T, bool>> where, bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc);


        /// <summary>
        /// 多个条件 根据 wheres.value  判断是否使用 此 wheres.key 的条件
        /// </summary>
        /// <param name="wheres">查询条件</param>
        /// <returns></returns>
        public Task<List<T>> getByWhereIF(Dictionary<Expression<Func<T, bool>>, bool> wheres, bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc);


        /// <summary>
        /// 查询 指定列的值 在 start至end 之间的数据
        /// </summary>
        /// <param name="value">指定类</param>
        /// <param name="start">开始</param>
        /// <param name="end">结束</param>
        /// <returns></returns>
        public Task<List<T>> getByBetween(object value, object start, object end, bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc);


        /// <summary>
        /// 判断是否存在这条记录
        /// </summary>
        /// <param name="where">条件</param>
        /// <returns></returns>
        public Task<bool> getIsAny(Expression<Func<T, bool>> where);


        /// <summary>
        /// 单表分页查询
        /// </summary>
        /// <typeparam name="T">要查询的表</typeparam>
        /// <param name="pageIndex">页码</param>
        /// <param name="pageSize">页面容量</param>
        /// <param name="isWhere">是否需要条件查询</param>
        /// <param name="whereExp">查询条件</param>
        /// <param name="isOrderBy">是否需要排序条件</param>
        /// <param name="orderBy">排序条件</param>
        /// <param name="orderByType">排序类型（Asc、Desc）</param>
        /// <returns></returns>
        public Task<List<T>> getPageList<T>(int pageIndex, int pageSize, bool isWhere = false, Expression<Func<T, bool>> whereExp = null, bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc);


        /// <summary>
        /// 两表查询，
        /// </summary>
        /// <typeparam name="T1">左表</typeparam>
        /// <typeparam name="T2">右表</typeparam>
        /// <param name="joinExp">联表方式，联表字段（主外键关系）</param>
        /// <param name="selectExp">联表查询的结果</param>
        /// <param name="isWhere">是否需要查询条件</param>
        /// <param name="whereExp">条件查询</param>
        /// <param name="isOrderBy">是否需要排序</param>
        /// <param name="orderBy">排序条件</param>
        /// <param name="orderByType">排序类型（Asc、Desc）</param>
        /// <returns></returns>
        public Task<dynamic> getJoinList<T1, T2>(Expression<Func<T1, T2, JoinQueryInfos>> joinExp, Expression<Func<T1, T2, dynamic>> selectExp, bool isWhere = false, Expression<Func<T1, T2, bool>> whereExp = null, bool isOrderBy = false, Expression<Func<T1, T2, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc);


        /// <summary>
        /// 两表 分页查询，
        /// </summary>
        /// <typeparam name="T1">左表</typeparam>
        /// <typeparam name="T2">右表</typeparam>
        /// <param name="joinExp">联表方式，联表字段（主外键关系）</param>
        /// <param name="selectExp">联表查询的结果</param>
        /// <param name="isWhere">是否需要查询条件</param>
        /// <param name="whereExp">条件查询</param>
        /// <param name="isOrderBy">是否需要排序</param>
        /// <param name="orderBy">排序条件</param>
        /// <param name="orderByType">排序类型（Asc、Desc）</param>
        /// <returns></returns>
        public Task<dynamic> getJoinPageList<T1, T2>(int pageIndex, int pageSize, Expression<Func<T1, T2, JoinQueryInfos>> joinExp, Expression<Func<T1, T2, dynamic>> selectExp, bool isWhere = false, Expression<Func<T1, T2, bool>> whereExp = null, bool isOrderBy = false, Expression<Func<T1, T2, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc);


        /// <summary>
        /// 三表连接 查询
        /// </summary>
        /// <typeparam name="T1">表1</typeparam>
        /// <typeparam name="T2">表2</typeparam>
        /// <typeparam name="T3">表3</typeparam>
        /// <param name="joinExp">联表方式，联表字段（主外键关系）</param>
        /// <param name="selectExp">联表查询的结果</param>
        /// <param name="isWhere">是否需要查询条件</param>
        /// <param name="whereExp">查询条件</param>
        /// <param name="isOrderBy">是否需要排序条件</param>
        /// <param name="orderBy">排序条件</param>
        /// <param name="orderByType">排序类型（Asc、Desc）</param>
        /// <returns></returns>
        public Task<dynamic> getJoinList<T1, T2, T3>(Expression<Func<T1, T2, T3, JoinQueryInfos>> joinExp, Expression<Func<T1, T2, T3, dynamic>> selectExp, bool isWhere = false, Expression<Func<T1, T2, bool>> whereExp = null, bool isOrderBy = false, Expression<Func<T1, T2, T3, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc);


        /// <summary>
        /// 三表连接 分页 查询
        /// </summary>
        /// <typeparam name="T1">表1</typeparam>
        /// <typeparam name="T2">表2</typeparam>
        /// <typeparam name="T3">表3</typeparam>
        /// <param name="joinExp">联表方式，联表字段（主外键关系）</param>
        /// <param name="selectExp">联表查询的结果</param>
        /// <param name="isWhere">是否需要查询条件</param>
        /// <param name="whereExp">查询条件</param>
        /// <param name="isOrderBy">是否需要排序条件</param>
        /// <param name="orderBy">排序条件</param>
        /// <param name="orderByType">排序类型（Asc、Desc）</param>
        /// <returns></returns>
        public Task<dynamic> getJoinList<T1, T2, T3>(int pageIndex, int pageSize, Expression<Func<T1, T2, T3, JoinQueryInfos>> joinExp, Expression<Func<T1, T2, T3, dynamic>> selectExp, bool isWhere = false, Expression<Func<T1, T2, bool>> whereExp = null, bool isOrderBy = false, Expression<Func<T1, T2, T3, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc);


        /// <summary>
        /// 执行查询sql语句 ，返回数据集
        /// </summary>
        /// <param name="sql">sql语句</param>
        /// <returns></returns>
        public Task<List<T>> getListBySql(string sql);


        /// <summary>
        /// 执行非查询sql语句，返回操作是否成功
        /// </summary>
        /// <param name="sql">sql语句</param>
        /// <param name="parameters">参数化</param>
        /// <returns></returns>
        public Task<bool> ExecuteCommandSql(string sql, params SugarParameter[] parameters);


        /// <summary>
        /// 执行查询sql语句，返回查询的结果集
        /// </summary>
        /// <param name="sql">sql语句</param>
        /// <param name="parameters">参数化</param>
        /// <returns></returns>
        public Task<List<T>> getListBySqlQuery(string sql, params SugarParameter[] parameters);


        /// <summary>
        /// 执行查询sql语句，返回 第一行第一列
        /// </summary>
        /// <param name="sql">sql语句</param>
        /// <param name="parameters">参数化</param>
        /// <returns></returns>
        public Task<object> getScalar(string sql, params SugarParameter[] parameters);



        #endregion

        #region Other


        /// <summary>
        /// 使用存储过程，返回结果集
        /// </summary>
        /// <param name="procedureName">存储过程名称 </param>
        /// <param name="parameters">参数，支持 output</param>
        /// <returns></returns>
        public Task<DataTable> UseStoredProcedure(string procedureName, params SugarParameter[] parameters);


        /// <summary>
        /// 使用事务 ，无返回值
        /// </summary>
        /// <param name="action">执行动作</param>
        /// <param name="errorCallBack">错误回调</param>
        public Task<DbResult<bool>> UseTran(Action action, Action<Exception> errorCallBack);


        /// <summary>
        /// 使用事务，有返回值
        /// </summary>
        /// <typeparam name="S">返回值类型</typeparam>
        /// <param name="func">执行动作</param>
        /// <param name="errorCallBack">错误回调</param>
        public Task<DbResult<S>> UseTran<S>(Func<S> func, Action<Exception> errorCallBack);


        #endregion
    }

public class BaseService<T> : IBaseService<T> where T : class, new()
    {
        private readonly IBaseRepository<T> _baseRepository;
        public BaseService(IBaseRepository<T> baseRepository)
        {
            _baseRepository = baseRepository;
        }
        public Task<bool> Add(T model)
        {
            return _baseRepository.Add(model);
        }

        public Task<bool> AddColumns(T model, params string[] columns)
        {
            return _baseRepository.AddColumns(model, columns);
        }

        public Task<bool> AddColumnsByIgnoreColumns(T model, params string[] IgnoreColumns)
        {
            return _baseRepository.AddColumnsByIgnoreColumns(model, IgnoreColumns);
        }

        public Task<bool> AddRange(List<T> list)
        {
            return _baseRepository.AddRange(list);
        }

        public Task<T> AddReturnEntity(T model)
        {
            return _baseRepository.AddReturnEntity(model);
        }

        public Task<bool> AddReturnIdentity(T model)
        {
            return _baseRepository.AddReturnIdentity(model);
        }

        public Task<bool> Delete<S>(S key)
        {
            return _baseRepository.Delete<S>(key);
        }

        public Task<bool> DeleteRange<S>(params S[] keys)
        {
            return _baseRepository.DeleteRange<S>(keys);
        }

        public Task<bool> DeleteWhere(Expression<Func<T, bool>> where)
        {
            return _baseRepository.DeleteWhere(where);
        }

        public Task<bool> ExecuteCommandSql(string sql, params SugarParameter[] parameters)
        {
            return _baseRepository.ExecuteCommandSql(sql, parameters);
        }

        public Task<List<T>> getAll(bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc)
        {
            return _baseRepository.getAll(isOrderBy, orderBy, orderByType);
        }

        public Task<List<T>> getByBetween(object value, object start, object end, bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc)
        {
            return _baseRepository.getByBetween(value, start, end, isOrderBy, orderBy, orderByType);
        }

        public Task<List<T>> getByIn<S>(List<S> list, bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc)
        {
            return _baseRepository.getByIn<S>(list, isOrderBy, orderBy, orderByType);
        }

        public Task<List<T>> getByIn<S>(Expression<Func<T, object>> column, List<S> list, bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc)
        {
            return _baseRepository.getByIn<S>(column, list, isOrderBy, orderBy, orderByType);
        }

        public Task<List<T>> getByNotIn<S>(List<S> list, object field, bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc)
        {
            return _baseRepository.getByNotIn<S>(list, field, isOrderBy, orderBy, orderByType);
        }

        public Task<T> getByPrimaryKey(object pkValue)
        {
            return _baseRepository.getByPrimaryKey(pkValue);
        }

        public Task<List<T>> getByWhere(Expression<Func<T, bool>> where, bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc)
        {
            return _baseRepository.getByWhere(where, isOrderBy, orderBy, orderByType);
        }

        public Task<List<T>> getByWhereIF(bool isWhere, Expression<Func<T, bool>> where, bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc)
        {
            return _baseRepository.getByWhereIF(isWhere, where, isOrderBy, orderBy, orderByType);
        }

        public Task<List<T>> getByWhereIF(Dictionary<Expression<Func<T, bool>>, bool> wheres, bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc)
        {
            return _baseRepository.getByWhereIF(wheres, isOrderBy, orderBy, orderByType);
        }

        public Task<T> getFirstOrDefault(Expression<Func<T, bool>> where)
        {
            return _baseRepository.getFirstOrDefault(where);
        }

        public Task<bool> getIsAny(Expression<Func<T, bool>> where)
        {
            return _baseRepository.getIsAny(where);
        }

        public Task<dynamic> getJoinList<T1, T2>(Expression<Func<T1, T2, JoinQueryInfos>> joinExp, Expression<Func<T1, T2, dynamic>> selectExp, bool isWhere = false, Expression<Func<T1, T2, bool>> whereExp = null, bool isOrderBy = false, Expression<Func<T1, T2, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc)
        {
            return _baseRepository.getJoinList<T1, T2>(joinExp, selectExp, isWhere, whereExp, isOrderBy, orderBy, orderByType);
        }

        public Task<dynamic> getJoinList<T1, T2, T3>(Expression<Func<T1, T2, T3, JoinQueryInfos>> joinExp, Expression<Func<T1, T2, T3, dynamic>> selectExp, bool isWhere = false, Expression<Func<T1, T2, bool>> whereExp = null, bool isOrderBy = false, Expression<Func<T1, T2, T3, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc)
        {
            return _baseRepository.getJoinList<T1, T2, T3>(joinExp, selectExp, isWhere, whereExp, isOrderBy, orderBy, orderByType);
        }

        public Task<dynamic> getJoinList<T1, T2, T3>(int pageIndex, int pageSize, Expression<Func<T1, T2, T3, JoinQueryInfos>> joinExp, Expression<Func<T1, T2, T3, dynamic>> selectExp, bool isWhere = false, Expression<Func<T1, T2, bool>> whereExp = null, bool isOrderBy = false, Expression<Func<T1, T2, T3, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc)
        {
            return _baseRepository.getJoinList<T1, T2, T3>(pageIndex, pageSize, joinExp, selectExp, isWhere, whereExp, isOrderBy, orderBy, orderByType); ;
        }

        public Task<dynamic> getJoinPageList<T1, T2>(int pageIndex, int pageSize, Expression<Func<T1, T2, JoinQueryInfos>> joinExp, Expression<Func<T1, T2, dynamic>> selectExp, bool isWhere = false, Expression<Func<T1, T2, bool>> whereExp = null, bool isOrderBy = false, Expression<Func<T1, T2, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc)
        {
            return _baseRepository.getJoinPageList<T1, T2>(pageIndex, pageSize, joinExp, selectExp, isWhere, whereExp, isOrderBy, orderBy, orderByType);
        }

        public Task<List<T>> getListBySql(string sql)
        {
            return _baseRepository.getListBySql(sql);
        }

        public Task<List<T>> getListBySqlQuery(string sql, params SugarParameter[] parameters)
        {
            return _baseRepository.getListBySqlQuery(sql, parameters);
        }

        public Task<List<T>> getPageList(int skip, int take, Expression<Func<T, bool>> whereExp, Expression<Func<T, object>> orderBy, OrderByType orderByType = OrderByType.Asc)
        {
            return _baseRepository.getPageList(skip, take, whereExp, orderBy, orderByType);
        }

        public Task<List<T1>> getPageList<T1>(int pageIndex, int pageSize, bool isWhere = false, Expression<Func<T1, bool>> whereExp = default, bool isOrderBy = false, Expression<Func<T1, object>> orderBy = default, OrderByType orderByType = OrderByType.Asc)
        {
            return _baseRepository.getPageList<T1>(pageIndex, pageSize, isWhere, whereExp, isOrderBy, orderBy, orderByType);
        }

        public Task<object> getScalar(string sql, params SugarParameter[] parameters)
        {
            return _baseRepository.getScalar(sql, parameters);
        }

        public Task<List<T>> getTakeList(int num, bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc)
        {
            return _baseRepository.getTakeList(num, isOrderBy, orderBy, orderByType);
        }

        public Task<List<T>> getTakeList(Expression<Func<T, bool>> where, int num, bool isOrderBy = false, Expression<Func<T, object>> orderBy = null, OrderByType orderByType = OrderByType.Asc)
        {
            return _baseRepository.getTakeList(where, num, isOrderBy, orderBy, orderByType);
        }

        public Task<bool> Update(T model)
        {
            return _baseRepository.Update(model);
        }

        public Task<bool> Update(T model, Expression<Func<T, object>> expression)
        {
            return _baseRepository.Update(model, expression);
        }

        public Task<bool> UpdateColumns(T model, params string[] columns)
        {
            return _baseRepository.UpdateColumns(model, columns);
        }

        public Task<bool> UpdateColumns(T model, Expression<Func<T, object>> columns)
        {
            return _baseRepository.UpdateColumns(model, columns);
        }

        public Task<bool> UpdateColumnsByIgnoreColumns(T model, params string[] columns)
        {
            return _baseRepository.UpdateColumnsByIgnoreColumns(model, columns);
        }

        public Task<bool> UpdateColumnsByIgnoreColumns(T model, Expression<Func<T, object>> columns)
        {
            return _baseRepository.UpdateColumnsByIgnoreColumns(model, columns);
        }

        public Task<bool> UpdateIF(T model, Dictionary<Expression<Func<T, object>>, bool> dic)
        {
            return _baseRepository.UpdateIF(model, dic);
        }

        public Task<bool> UpdateNotNullColumns(T model, bool ignoreAllNullColumns, bool isOffIdentity = false, bool ignoreAllDefaultValue = false)
        {
            return _baseRepository.UpdateNotNullColumns(model, ignoreAllNullColumns, isOffIdentity, ignoreAllDefaultValue);
        }

        public Task<bool> UpdateRange(List<T> list)
        {
            return _baseRepository.UpdateRange(list);
        }

        public Task<DataTable> UseStoredProcedure(string procedureName, params SugarParameter[] parameters)
        {
            return _baseRepository.UseStoredProcedure(procedureName, parameters);
        }

        public Task<DbResult<bool>> UseTran(Action action, Action<Exception> errorCallBack)
        {
            return _baseRepository.UseTran(action, errorCallBack);
        }

        public Task<DbResult<S>> UseTran<S>(Func<S> func, Action<Exception> errorCallBack)
        {
            return _baseRepository.UseTran<S>(func, errorCallBack);
        }
    }

 public interface IStudentInfoService : IBaseService<StudentInfo>
    {
    }

public class StudentInfoService : BaseService<StudentInfo>, IStudentInfoService
    {
        public StudentInfoService(IBaseRepository<StudentInfo> baseRepository)
            : base(baseRepository)
        {
        }
    }

// This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddControllersWithViews();

           services.AddTransient(typeof(IBaseRepository<>), typeof(BaseRepository<>));

            services.AddTransient<IStudentInfoService, StudentInfoService>();
          
            services.AddTransient<IDbContext, AppDbContext>();
        }