作业帮asp.net教程：.net 数据类型转换类(带判断)
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/14 04:56:48 ASP.NET
using System;
using System.Collections.Generic;
using System.Text;
namespace Devin.Common.Helper
{
///
/// 数据类型转换
///
public class DataConvert
{
///
/// 转成String类型
///
///
///
public static String GetString(Object V)
{
return GetString(V, String.Empty);
}
///
/// 转成String类型
///
///
///
///
public static String GetString(Object V, String defaultValue)
{
if (!IsNull(V))
{
return V.ToString().Trim().Replace(">", ">").Replace("<", "<").Replace("'", "'");
}
return defaultValue;
}
///
/// 转成String类型
///
///
///
public static String SetString(Object V)
{
if (!IsNull(V))
{
return V.ToString().Trim().Replace(">", ">").Replace("<", "<").Replace("'", "'");
}
return "";
}
///
/// 转成Guid类型
///
///
///
public static Guid GetGuid(Object V)
{
return GetGuid(V, Guid.Empty);
}
///
/// 转成Guid类型
///
///
///
///
public static Guid GetGuid(Object V, Guid defaultValue)
{
if (!(!IsNull(V) && IsGuid(V)))
{
return defaultValue;
}
return new Guid(V.ToString());
}
///
/// 转成Int32类型
///
///
///
public static Int32 GetInt32(Object V)
{
return GetInt32(V, 0);
}
///
/// 转成Int32类型
///
///
///
///
public static Int32 GetInt32(Object V, Int32 defaultValue)
{
if (!(!IsNull(V) && IsInt32(V)))
{
return defaultValue;
}
return Convert.ToInt32(V);
}
///
/// 转成Int16类型
///
///
///
public static Int16 GetInt16(Object V)
{
return GetInt16(V, 0);
}
///
/// 转成Int16类型
///
///
///
///
public static Int16 GetInt16(Object V, Int16 defaultValue)
{
if (!(!IsNull(V) && IsInt16(V)))
{
return defaultValue;
}
return Convert.ToInt16(V);
}
///
/// 转成Int64类型
///
///
///
public static Int64 GetInt64(Object V)
{
return GetInt64(V, 0);
}
///
/// 转成Int64类型
///
///
///
///
public static Int64 GetInt64(Object V, Int64 defaultValue)
{
if (!(!IsNull(V) && IsInt64(V)))
{
return defaultValue;
}
return Convert.ToInt64(V);
}
///
/// 转成Double类型
///
///
///
public static Double GetDouble(Object V)
{
return GetDouble(V, 0);
}
///
/// 转成Double类型
///
///
///
///
public static Double GetDouble(Object V, Double defaultValue)
{
if (!(!IsNull(V) && IsDouble(V)))
{
return defaultValue;
}
return Convert.ToDouble(V);
}
///
/// 转成Boolean类型
///
///
///
public static Boolean GetBoolean(Object V)
{
return GetBoolean(V, false);
}
///
/// 转成Boolean类型
///
///
///
///
public static Boolean GetBoolean(Object V, Boolean defaultValue)
{
if (!(!IsNull(V) && IsBoolean(V)))
{
return defaultValue;
}
return Convert.ToBoolean(V);
}
///
/// 转成DateTime类型
///
///
///
public static DateTime GetDateTime(Object V)
{
return GetDateTime(V, DateTime.Now);
}
///
/// 转成DateTime类型
///
///
///
///
public static DateTime GetDateTime(Object V, DateTime defaultValue)
{
if (!(!IsNull(V) && IsDateTime(V)))
{
return defaultValue;
}
return Convert.ToDateTime(V);
}
///
/// 转成Decimal类型
///
///
///
public static Decimal GetDecimal(Object V)
{
return GetDecimal(V, 0);
}
///
/// 转成Decimal类型
///
///
///
///
public static Decimal GetDecimal(Object V, Decimal defaultValue)
{
if (!(!IsNull(V) && IsDecimal(V)))
{
return defaultValue;
}
return Convert.ToDecimal(V);
}
///
/// 转成Single类型
///
///
///
public static Single GetSingle(Object V)
{
return GetSingle(V, 0);
}
///
/// 转成Single类型
///
///
///
///
public static Single GetSingle(Object V, Single defaultValue)
{
if (!(!IsNull(V) && IsSingle(V)))
{
return defaultValue;
}
return Convert.ToSingle(V);
}
///
/// 是否为空
///
///
///
public static Boolean IsNull(Object V)
{
if (!((V == null) || Convert.IsDBNull(V)))
{
return false;
}
return true;
}
///
/// 检查是否为 int 型
///
///
///
public static Boolean IsNumeric(String v)
{
try
{
int var1 = Convert.ToInt32(v);
return true;
}
catch
{
return false;
}
}
///
/// 是否为 Guid 类型
///
///
///
public static Boolean IsGuid(Object V)
{
try
{
Guid guid = new Guid(V.ToString());
return true;
}
catch
{
return false;
}
}
///
/// 是否为Int32类型
///
///
///
public static Boolean IsInt32(Object V)
{
try
{
Convert.ToInt32(V);
return true;
}
catch
{
return false;
}
}
///
/// 是否为Int16类型
///
///
///
public static Boolean IsInt16(Object V)
{
try
{
Convert.ToInt16(V);
return true;
}
catch
{
return false;
}
}
///
/// 是否为Int64类型
///
///
///
public static Boolean IsInt64(Object V)
{
try
{
Convert.ToInt64(V);
return true;
}
catch
{
return false;
}
}
///
/// 是否为Double类型
///
///
///
public static Boolean IsDouble(Object V)
{
try
{
Convert.ToDouble(V);
return true;
}
catch
{
return false;
}
}
///
/// 是否为DateTime类型
///
///
///
public static Boolean IsDateTime(Object V)
{
try
{
Convert.ToDateTime(V);
return true;
}
catch
{
return false;
}
}
///
/// 是否为Decimal类型
///
///
///
public static Boolean IsDecimal(Object V)
{
try
{
Convert.ToDecimal(V);
return true;
}
catch
{
return false;
}
}
///
/// 是否为Boolean类型
///
///
///
public static Boolean IsBoolean(Object V)
{
try
{
Convert.ToBoolean(V);
return true;
}
catch
{
return false;
}
}
///
/// 是否为Single类型
///
///
///
public static Boolean IsSingle(Object V)
{
try
{
Convert.ToSingle(V);
return true;
}
catch
{
return false;
}
}
}
}