asp.net 数据类型转换类代码


            复制代码 代码如下: 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; } } }