/// <summary>

    /// 将泛类型集合List类转换成DataTable

    /// </summary>

    /// <param name="list">泛类型集合</param>

    /// <returns></returns>

    public static DataTable ListToDataTable<T>(List<T> entitys)

    {

        //检查实体集合不能为空

        if (entitys == null || entitys.Count < 1)

        {

            throw new Exception("需转换的集合为空");

        }

        //取出第一个实体的所有Propertie

        Type entityType = entitys[0].GetType();

        PropertyInfo[] entityProperties = entityType.GetProperties();

        //生成DataTable的structure

        //生产代码中，应将生成的DataTable结构Cache起来，此处略

        DataTable dt = new DataTable();

        for (int i = 0; i < entityProperties.Length; i++)

        {

            //dt.Columns.Add(entityProperties[i].Name, entityProperties[i].PropertyType);

            dt.Columns.Add(entityProperties[i].Name);

        }

        //将所有entity添加到DataTable中

        foreach (object entity in entitys)

        {

            //检查所有的的实体都为同一类型

            if (entity.GetType() != entityType)

            {

                throw new Exception("要转换的集合元素类型不一致");

            }

            object[] entityValues = new object[entityProperties.Length];

            for (int i = 0; i < entityProperties.Length; i++)

            {

                entityValues[i] = entityProperties[i].GetValue(entity, null);

            }

            dt.Rows.Add(entityValues);

        }

        return dt;

    }