using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Text.RegularExpressions; namespace IBO.XJMYQP.Utility
{
public static class Extension
{
#region String Extension public static string[] Split(this string val, string code)
{
return Regex.Split(val, code);
} public static bool IsNullOrEmpty(this string val)
{
return string.IsNullOrEmpty(val);
} public static bool IsNotEmpty(this string val)
{
return !string.IsNullOrEmpty(val);
} public static string ToString2(this object val)
{
if (val == null)
return string.Empty;
return val.ToString();
} /// <summary>
/// 将1900-01-01或 0001/1/1 转换为空字符串
/// </summary>
/// <param name="val"></param>
/// <returns></returns>
public static string ToVaildDateTime(this object val)
{
if (val == null)
return string.Empty;
else if (val.ToString() == "0001/1/1 0:00:00")
return string.Empty;
else if (val.ToString() == "1900-01-01 00:00:00.000" || val.ToString() == "1900/1/1 0:00:00")
return string.Empty;
return val.ToString();
} /// <summary>
/// 将空值和NULL值转换为一个默认的时间1900-01-01
/// </summary>
/// <param name="val"></param>
/// <returns></returns>
public static string ToInVaildDateTime(this object val)
{
if (val == null)
return "1900-01-01";
else if (val.ToString2().IsNullOrEmpty())
return "1900-01-01";
return val.ToString();
} /// <summary>
/// 判断字符串是否是数字
/// </summary>
public static bool IsNumeral(this string val)
{
decimal i = 0;
return decimal.TryParse(val, out i);
} /// <summary>
/// 清除空格，加入非空判断，空字符串调用也不会报错
/// </summary>
public static string TrimSpace(this string val)
{
if (val == null)
return null;
else
return val.Trim();
} public static bool Contains(this string val, string value, StringComparison comp)
{
return val.IndexOf(value, comp) >= 0;
} public static DateTime? ToDateTime(this string val)
{
if (string.IsNullOrEmpty(val)) return null;
DateTime dt;
if (DateTime.TryParse(val, out dt))
{
return dt;
}
return null;
} public static bool ToBoolean(this string val)
{
if (string.IsNullOrEmpty(val)) return false;
return val == Boolean.TrueString;
} public static int ToInt(this string val)
{
int intValue;
if (int.TryParse(val, out intValue))
{
return intValue;
}
return 0;
} public static long ToLong(this string val)
{
long intValue;
if (long.TryParse(val, out intValue))
{
return intValue;
}
return 0;
} public static decimal ToDecimal(this string val)
{
decimal intValue;
if (decimal.TryParse(val, out intValue))
{
return intValue;
}
return 0;
} public static double ToDouble(this string val)
{
double result;
if (double.TryParse(val, out result))
{
return result;
}
return 0;
} public static float ToFloat(this string val)
{
float result;
if (float.TryParse(val, out result))
{
return result;
}
return 0;
} /// <summary>
/// 按照长度截取字符串
/// </summary>
/// <param name="val"></param>
/// <param name="length"></param>
/// <returns></returns>
public static string Truncate(this string val, int length)
{
if (string.IsNullOrEmpty(val))
return val;
return (val.Length > length ? val.Substring(0, length - 1) : val);
} /// <summary>
/// 按照长度截取字符串
/// </summary>
/// <param name="val"></param>
/// <param name="length"></param>
/// <param name="coda">结尾符号</param>
/// <returns></returns>
public static string Truncate(this string val, int length, string coda)
{
if (string.IsNullOrEmpty(val))
return val;
return (val.Length > length ? val.Substring(0, length - 1) + coda : val);
} public static int ParseDayOfWeek(this string val)
{
val = val.ToLower();
switch (val)
{
case "monday":
return 1;
case "tuesday":
return 2;
case "wednesday":
return 3;
case "thursday":
return 4;
case "friday":
return 5;
case "saturday":
return 6;
case "sunday":
return 7;
default:
return 0;
}
} /// <summary>
/// 截取指定字节长度的字符串
/// </summary>
/// <param name="str">原字符串</param>
/// <param name="len">截取字节长度</param>
/// <returns></returns>
public static string CutByteString(this string str, int len)
{
string result = string.Empty;// 最终返回的结果
if (string.IsNullOrEmpty(str)) { return result; }
int byteLen = System.Text.Encoding.Default.GetByteCount(str);// 单字节字符长度
int charLen = str.Length;// 把字符平等对待时的字符串长度
int byteCount = 0;// 记录读取进度
int pos = 0;// 记录截取位置
if (byteLen > len)
{
for (int i = 0; i < charLen; i++)
{
if (Convert.ToInt32(str.ToCharArray()[i]) > 255)// 按中文字符计算加2
{ byteCount += 2; }
else// 按英文字符计算加1
{ byteCount += 1; }
if (byteCount > len)// 超出时只记下上一个有效位置
{
pos = i;
break;
}
else if (byteCount == len)// 记下当前位置
{
pos = i + 1;
break;
}
}
if (pos >= 0)
{ result = str.Substring(0, pos); }
}
else
{ result = str; }
return result;
} /// <summary>
/// 截取指定字节长度的字符串
/// </summary>
/// <param name="str">原字符串</param>
/// <param name="startIndex">起始位置</param>
/// <param name="len">截取字节长度</param>
/// <returns></returns>
public static string CutByteString(this string str, int startIndex, int len)
{
string result = string.Empty;// 最终返回的结果
if (string.IsNullOrEmpty(str)) { return result; } int byteLen = System.Text.Encoding.Default.GetByteCount(str);// 单字节字符长度
int charLen = str.Length;// 把字符平等对待时的字符串长度 if (startIndex == 0)
{ return CutByteString(str, len); }
else if (startIndex >= byteLen)
{ return result; }
else //startIndex < byteLen
{
int AllLen = startIndex + len;
int byteCountStart = 0;// 记录读取进度
int byteCountEnd = 0;// 记录读取进度
int startpos = 0;// 记录截取位置
int endpos = 0;// 记录截取位置
for (int i = 0; i < charLen; i++)
{
if (Convert.ToInt32(str.ToCharArray()[i]) > 255)// 按中文字符计算加2
{ byteCountStart += 2; }
else// 按英文字符计算加1
{ byteCountStart += 1; }
if (byteCountStart > startIndex)// 超出时只记下上一个有效位置
{
startpos = i;
AllLen = startIndex + len - 1;
break;
}
else if (byteCountStart == startIndex)// 记下当前位置
{
startpos = i + 1;
break;
}
} if (startIndex + len <= byteLen)//截取字符在总长以内
{
for (int i = 0; i < charLen; i++)
{
if (Convert.ToInt32(str.ToCharArray()[i]) > 255)// 按中文字符计算加2
{ byteCountEnd += 2; }
else// 按英文字符计算加1
{ byteCountEnd += 1; }
if (byteCountEnd > AllLen)// 超出时只记下上一个有效位置
{
endpos = i;
break;
}
else if (byteCountEnd == AllLen)// 记下当前位置
{
endpos = i + 1;
break;
}
}
endpos = endpos - startpos;
}
else if (startIndex + len > byteLen)//截取字符超出总长
{
endpos = charLen - startpos;
}
if (endpos >= 0)
{ result = str.Substring(startpos, endpos); }
}
return result;
} #endregion #region Object Extension public static DateTime? ToDateTime(this object val)
{
if (val == null) return null;
return val.ToString().ToDateTime();
} public static DateTime ToDateTime2(this object val)
{
if (val == null) return DateTime.MinValue;
var time = val.ToString().ToDateTime();
return time.HasValue ? time.Value : DateTime.MinValue;
} public static Guid ToGuid(this object val)
{
//=>3.5没有提供Guid.TryParse 方法。
if (val == null) return Guid.Empty;
Guid gd;
try
{
gd = new Guid(val.ToString2());
return gd;
}
catch
{
return Guid.Empty;
}
} public static bool ToBoolean(this object val)
{
if (val == null) return false;
return val.ToString().ToBoolean();
} public static int ToInt(this object val)
{
if (val == null) return 0;
return val.ToString().ToInt();
} public static long ToLong(this object val)
{
if (val == null) return 0;
return val.ToString().ToLong();
} public static int ToIndexInt(this object val)
{
if (val == null) return -1;
return val.ToString().ToInt();
} public static decimal ToDecimal(this object val)
{
if (val == null) return 0;
return val.ToString().ToDecimal();
} public static double ToDouble(this object val)
{
if (val == null) return 0;
return val.ToString().ToDouble();
}
public static float ToFloat(this object val)
{
if (val == null) return 0;
return val.ToString().ToFloat();
} /// <summary>
/// 对象转换为Json
/// </summary>
/// <param name="jsonObject">对象</param>
/// <returns>Json字符串</returns>
public static string ToJson(this object jsonObject)
{
string jsonString = "{";
PropertyInfo[] propertyInfo = jsonObject.GetType().GetProperties();
for (int i = 0; i < propertyInfo.Length; i++)
{
object objectValue = propertyInfo[i].GetGetMethod().Invoke(jsonObject, null);
string value = string.Empty;
if (objectValue is DateTime || objectValue is Guid || objectValue is TimeSpan)
{
value = "'" + objectValue.ToString() + "'";
}
else if (objectValue is string)
{
value = "'" + ToJson(objectValue.ToString()) + "'";
}
else if (objectValue is IEnumerable)
{
value = ToJson((IEnumerable)objectValue);
}
else
{
value = ToJson(objectValue.ToString());
}
jsonString += "\"" + ToJson(propertyInfo[i].Name) + "\":" + value + ",";
}
jsonString.Remove(jsonString.Length - 1, jsonString.Length);
return jsonString + "}";
} #endregion #region Numeral Extension
/// <summary>
/// 是否在指定范围内
/// </summary>
/// <param name="start">起始数值</param>
/// <param name="end">结束数值</param>
public static bool Between(this decimal val, decimal start, decimal end)
{
return val >= start && val <= end;
}
/// <summary>
/// 是否在指定范围内
/// </summary>
/// <param name="start">起始数值</param>
/// <param name="end">结束数值</param>
public static bool Between(this int val, int start, int end)
{
return val >= start && val <= end;
}
/// <summary>
/// 是否在指定范围内
/// </summary>
/// <param name="start">起始数值</param>
/// <param name="end">结束数值</param>
public static bool Between(this float val, float start, float end)
{
return val >= start && val <= end;
}
/// <summary>
/// 是否在指定范围内
/// </summary>
/// <param name="start">起始数值</param>
/// <param name="end">结束数值</param>
public static bool Between(this double val, double start, double end)
{
return val >= start && val <= end;
} /// <summary>
/// 是否在指定范围内
/// </summary>
/// <param name="start">起始数值</param>
/// <param name="end">结束数值</param>
public static bool Between(this decimal? val, decimal start, decimal end)
{
return val.HasValue ? (val >= start && val <= end) : false;
}
/// <summary>
/// 是否在指定范围内
/// </summary>
/// <param name="start">起始数值</param>
/// <param name="end">结束数值</param>
public static bool Between(this int? val, int start, int end)
{
return val.HasValue ? (val >= start && val <= end) : false;
}
/// <summary>
/// 是否在指定范围内
/// </summary>
/// <param name="start">起始数值</param>
/// <param name="end">结束数值</param>
public static bool Between(this float? val, float start, float end)
{
return val.HasValue ? (val >= start && val <= end) : false;
}
/// <summary>
/// 是否在指定范围内
/// </summary>
/// <param name="start">起始数值</param>
/// <param name="end">结束数值</param>
public static bool Between(this double? val, double start, double end)
{
return val.HasValue ? (val >= start && val <= end) : false;
} #endregion #region Data Extension
/// <summary>
/// 通用简单实体类型互转
/// </summary>
public static List<ResultType> ConvertToEntityList<ResultType>(this object list) where ResultType : new()
{
List<ResultType> ResultList = new List<ResultType>();
if (list == null) return ResultList;
Type fromObj = list.GetType();
if (fromObj.Equals(typeof(DataTable)))
{
var dt = list as DataTable;
ResultList = dt.Rows.Cast<DataRow>().Where(m => !(m.RowState == DataRowState.Deleted || m.RowState == DataRowState.Detached)).Select(m => m.ConvertToEntityByDataRow<ResultType>()).ToList();
}
else if (list is IEnumerable)
{
ResultList = ((IList)list).Cast<object>().Select(m => m.ConvertToEntity<ResultType>()).ToList();
}
return ResultList;
} /// <summary>
/// 通用简单实体类型互转
/// </summary>
public static ResultType ConvertToEntity<ResultType>(this object fromEntity) where ResultType : new()
{
ResultType t = new ResultType();
Type fromObj = fromEntity.GetType();
if (fromObj.Equals(typeof(DataRow)))
{
//DataRow类型
DataRow dr = fromEntity as DataRow;
t = dr.ConvertToEntityByDataRow<ResultType>();
}
else
{
Type type = typeof(ResultType);
PropertyInfo[] properties = type.GetProperties();
PropertyInfo[] fromProperties = fromObj.GetProperties();
foreach (PropertyInfo pro in properties)
{
foreach (var fromPro in fromProperties)
{
if (fromPro.Name.Equals(pro.Name, StringComparison.OrdinalIgnoreCase))
{
object value = fromPro.GetValue(fromEntity, null);
if (value != null && value != DBNull.Value)
{
if (fromPro.PropertyType.Name != pro.PropertyType.Name)
{
if (pro.PropertyType.IsEnum)
{
pro.SetValue(t, Enum.Parse(pro.PropertyType, value.ToString()), null);
}
else
{
try
{
value = Convert.ChangeType
(
value,
(Nullable.GetUnderlyingType(pro.PropertyType) ?? pro.PropertyType)
);
pro.SetValue(t, value, null);
}
catch { }
}
}
else
{
pro.SetValue(t, value, null);
}
}
else
{
pro.SetValue(t, null, null);
}
break;
}
}
}
}
return t;
} /// <summary>
/// DataRow转换为实体类
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="dr"></param>
/// <returns></returns>
public static T ConvertToEntityByDataRow<T>(this DataRow dr) where T : new()
{
Type type = typeof(T);
PropertyInfo[] properties = type.GetProperties();
T t = new T();
if (dr == null) return t;
var columns = dr.Table.Columns.Cast<DataColumn>();
foreach (PropertyInfo pi in properties)
{
foreach (DataColumn column in dr.Table.Columns)
{
if (pi.Name.Equals(column.ColumnName, StringComparison.OrdinalIgnoreCase))
{
object value = dr[column];
if (value != null && value != DBNull.Value)
{
if (value.GetType().Name != pi.PropertyType.Name)
{
if (pi.PropertyType.IsEnum)
{
pi.SetValue(t, Enum.Parse(pi.PropertyType, value.ToString()), null);
}
else
{
try
{
value = Convert.ChangeType
(
value,
(Nullable.GetUnderlyingType(pi.PropertyType) ?? pi.PropertyType)
);
pi.SetValue(t, value, null);
}
catch { }
}
}
else
{
pi.SetValue(t, value, null);
}
}
else
{
pi.SetValue(t, null, null);
}
break;
}
}
}
return t;
} /// <summary>
/// 转换为DataTable，如果是集合没有数据行时候会抛异常。
/// </summary>
/// <param name="list"></param>
/// <returns></returns>
public static DataTable ConvertToDataTable(this object list)
{
if (list == null) return null;
DataTable dt = new DataTable();
if (list is IEnumerable)
{
var li = (IList)list;
//li[0]代表的是一个对象，list没有行时，会抛异常。
PropertyInfo[] properties = li[0].GetType().GetProperties();
dt.Columns.AddRange(properties.Where(m => !m.PropertyType.IsClass || !m.PropertyType.IsInterface).Select(m =>
new DataColumn(m.Name, Nullable.GetUnderlyingType(m.PropertyType) ?? m.PropertyType)).ToArray());
foreach (var item in li)
{
DataRow dr = dt.NewRow();
foreach (PropertyInfo pp in properties.Where(m => m.PropertyType.GetProperty("Item") == null)) //过滤含有索引器的属性
{
object value = pp.GetValue(item, null);
dr[pp.Name] = value == null ? DBNull.Value : value;
}
dt.Rows.Add(dr);
}
}
else
{
PropertyInfo[] properties = list.GetType().GetProperties();
properties = properties.Where(m => m.PropertyType.GetProperty("Item") == null).ToArray();//过滤含有索引器的属性
dt.Columns.AddRange(properties.Select(m =>
new DataColumn(m.Name, Nullable.GetUnderlyingType(m.PropertyType) ?? m.PropertyType)).ToArray());
DataRow dr = dt.NewRow();
foreach (PropertyInfo pp in properties)
{
object value = pp.GetValue(list, null);
dr[pp.Name] = value == null ? DBNull.Value : value;
}
dt.Rows.Add(dr);
}
return dt;
} /// <summary>
/// 转换为DataTable;如果list数据行为0，也不会抛异常，返回空行，是按照<T>进行转换。
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="list"></param>
/// <returns></returns>
public static DataTable ConvertToDataTable<T>(this object list) where T : new()
{
var dt = new DataTable();
if (list is IEnumerable)
{
IEnumerable<T> collection = (IEnumerable<T>)list;
var props = typeof(T).GetProperties();
dt.Columns.AddRange(props.Select(p => new DataColumn(p.Name, p.PropertyType)).ToArray());
if (collection.Count() > 0)
{
for (int i = 0; i < collection.Count(); i++)
{
ArrayList tempList = new ArrayList();
foreach (PropertyInfo pi in props)
{
object obj = pi.GetValue(collection.ElementAt(i), null);
tempList.Add(obj);
}
object[] array = tempList.ToArray();
dt.LoadDataRow(array, true);
}
}
}
return dt;
} /// <summary>
/// 实体类公共属性值复制
/// </summary>
/// <param name="entity"></param>
/// <param name="target"></param>
public static void CopyTo(this object entity, object target)
{
if (target == null) return;
if (entity.GetType() != target.GetType())
return;
PropertyInfo[] properties = target.GetType().GetProperties();
foreach (PropertyInfo pro in properties)
{
if (pro.PropertyType.GetProperty("Item") != null)
continue;
object value = pro.GetValue(entity, null);
if (value != null)
{
if (value is ICloneable)
{
pro.SetValue(target, (value as ICloneable).Clone(), null);
}
else
{
pro.SetValue(target, value.Copy(), null);
}
}
else
{
pro.SetValue(target, null, null);
}
}
} public static object Copy(this object obj)
{
if (obj == null) return null;
Object targetDeepCopyObj;
Type targetType = obj.GetType();
if (targetType.IsValueType == true)
{
targetDeepCopyObj = obj;
}
else
{
targetDeepCopyObj = System.Activator.CreateInstance(targetType); //创建引用对象
System.Reflection.MemberInfo[] memberCollection = obj.GetType().GetMembers(); foreach (System.Reflection.MemberInfo member in memberCollection)
{
if (member.GetType().GetProperty("Item") != null)
continue;
if (member.MemberType == System.Reflection.MemberTypes.Field)
{
System.Reflection.FieldInfo field = (System.Reflection.FieldInfo)member;
Object fieldValue = field.GetValue(obj);
if (fieldValue is ICloneable)
{
field.SetValue(targetDeepCopyObj, (fieldValue as ICloneable).Clone());
}
else
{
field.SetValue(targetDeepCopyObj, fieldValue.Copy());
}
}
else if (member.MemberType == System.Reflection.MemberTypes.Property)
{
System.Reflection.PropertyInfo myProperty = (System.Reflection.PropertyInfo)member;
MethodInfo info = myProperty.GetSetMethod(false);
if (info != null)
{
object propertyValue = myProperty.GetValue(obj, null);
if (propertyValue is ICloneable)
{
myProperty.SetValue(targetDeepCopyObj, (propertyValue as ICloneable).Clone(), null);
}
else
{
myProperty.SetValue(targetDeepCopyObj, propertyValue.Copy(), null);
}
}
}
}
}
return targetDeepCopyObj;
} #endregion public static T ChangeType<T>(this object obj, T t)
{
return (T)obj;
} public static string ConverToHTML(this DataTable dt)
{
System.Text.StringBuilder sb = new StringBuilder();
sb.AppendLine("<table style='font-size:12px;' border='1' cellspacing='0' cellpadding='3'>");
sb.Append(" <tr>");
foreach (DataColumn col in dt.Columns)
{
sb.Append(string.Format("<th>{0}</th>", col.ColumnName));
}
sb.AppendLine(" </tr>");
foreach (DataRow dr in dt.Rows)
{
sb.Append(" <tr>");
foreach (DataColumn col in dt.Columns)
{
sb.Append(string.Format("<td>{0}</td>", dr[col].ToString()));
}
sb.AppendLine(" </tr>");
}
sb.AppendLine("</table>");
return sb.ToString();
} }
}