asp.net 数据类型转换类代码

using System; 
using System.Collections.Generic; 
using System.Text; 
using System.Text.RegularExpressions; 
namespace TypeClass 
{ 
public class TypeParse 
{ 
/// <summary> 
/// 判断对象是否为Int32类型的数字 
/// </summary> 
/// <param name="Expression"></param> 
/// <returns></returns> 
public static bool IsNumeric(object Expression) 
{ 
if (Expression != null) 
{ 
int intVal; 
return int.TryParse(Expression.ToString(), out intVal); 
} 
return false; 
} 
public static bool IsDouble(object Expression) 
{ 
if (Expression != null) 
{ 
double doubleVal; 
return double.TryParse(Expression.ToString(), out doubleVal); 
} 
return false; 
} 
/// <summary> 
/// string型转换为bool型 
/// </summary> 
/// <param name="strValue">要转换的字符串</param> 
/// <param name="defValue">缺省值</param> 
/// <returns>转换后的bool类型结果</returns> 
public static bool StrToBool(object Expression, bool defValue) 
{ 
if (Expression != null) 
{ 
bool boolValue; 
if (bool.TryParse(Expression.ToString(), out boolValue)) 
return boolValue; 
else 
return defValue; 
} 
return defValue; 
} 
/// <summary> 
/// 将对象转换为Int32类型 
/// </summary> 
/// <param name="strValue">要转换的字符串</param> 
/// <param name="defValue">缺省值</param> 
/// <returns>转换后的Int32类型结果</returns> 
public static int StrToInt(object Expression, int defValue) 
{ 
if (Expression != null) 
{ 
int intValue; 
if (int.TryParse(Expression.ToString(), out intValue)) 
return intValue; 
else 
return defValue; 
} 
return defValue; 
} 
/// <summary> 
/// string型转换为float型 
/// </summary> 
/// <param name="strValue">要转换的字符串</param> 
/// <param name="defValue">缺省值</param> 
/// <returns>转换后的float类型结果</returns> 
public static float StrToFloat(object strValue, float defValue) 
{ 
if (strValue != null) 
{ 
float floatValue; 
if (float.TryParse(strValue.ToString(), out floatValue)) 
return floatValue; 
else 
return defValue; 
} 
return defValue; 
} 
/// <summary> 
/// string型转换为Decimal型 
/// </summary> 
/// <param name="strValue">要转换的字符串</param> 
/// <param name="defValue">缺省值</param> 
/// <returns>转换后的Decimal类型结果</returns> 
public static Decimal StrToDecimal(object strValue, Decimal defValue) 
{ 
if (strValue != null) 
{ 
Decimal decimalValue; 
if (Decimal.TryParse(strValue.ToString(), out decimalValue)) 
return Math.Round(decimalValue,2); 
else 
return defValue; 
} 
return defValue; 
} 
/// <summary> 
/// string型转换为datetime型 
/// </summary> 
/// <param name="strValue">要转换的字符串</param> 
/// <param name="defValue">缺省值</param> 
/// <returns>转换后的datetime类型结果</returns> 
public static DateTime StrToDateTime(object strValue, DateTime defValue) 
{ 
if (strValue != null) 
{ 
DateTime DateTimeValue; 
if (DateTime.TryParse(strValue.ToString(), out DateTimeValue)) 
return DateTimeValue; 
else 
return defValue; 
} 
return defValue; 
} 
/// <summary> 
/// 判断给定的字符串数组(strNumber)中的数据是不是都为数值型 
/// </summary> 
/// <param name="strNumber">要确认的字符串数组</param> 
/// <returns>是则返加true 不是则返回 false</returns> 
public static bool IsNumericArray(string[] strNumber) 
{ 
if (strNumber == null) 
{ 
return false; 
} 
if (strNumber.Length < 1) 
{ 
return false; 
} 
foreach (string id in strNumber) 
{ 
if (!IsNumeric(id)) 
{ 
return false; 
} 
} 
return true; 
} 
} 
}