这个C#类定义了一些开发过程中经常要使用的到的函数和方法，包括数据转换，数据类型判断，格式化日期、计算两个日期之间的差值等等，你还可以自己扩充这个类，把自己常用的函数或者方法放进去。
using System;
using System.IO;using System.Data;using System.Collections;using System.Text.RegularExpressions;using System.Web.UI;namespace DotNet.Utilities
{ /// <summary> /// Utility 的摘要说明。 /// </summary> public class Utility:Page {#region 数据转换
/// <summary> /// 返回对象obj的String值,obj为null时返回空值。 /// </summary> /// <param name="obj">对象。</param> /// <returns>字符串。</returns> public static string ToObjectString(object obj) { return null == obj ? String.Empty : obj.ToString(); }/// <summary>
/// 将对象转换为数值(Int32)类型,转换失败返回-1。 /// </summary> /// <param name="obj">对象。</param> /// <returns>Int32数值。</returns> public static int ToInt(object obj) { try { return int.Parse(ToObjectString(obj)); } catch { return -1; } }/// <summary>
/// 将对象转换为数值(Int32)类型。 /// </summary> /// <param name="obj">对象。</param> /// <param name="returnValue">转换失败返回该值。</param> /// <returns>Int32数值。</returns> public static int ToInt(object obj,int returnValue) { try { return int.Parse(ToObjectString(obj)); } catch { return returnValue; } } /// <summary> /// 将对象转换为数值(Long)类型,转换失败返回-1。 /// </summary> /// <param name="obj">对象。</param> /// <returns>Long数值。</returns> public static long ToLong(object obj) { try { return long.Parse(ToObjectString(obj)); } catch { return -1L; } } /// <summary> /// 将对象转换为数值(Long)类型。 /// </summary> /// <param name="obj">对象。</param> /// <param name="returnValue">转换失败返回该值。</param> /// <returns>Long数值。</returns> public static long ToLong(object obj,long returnValue) { try { return long.Parse(ToObjectString(obj)); } catch { return returnValue; } } /// <summary> /// 将对象转换为数值(Decimal)类型,转换失败返回-1。 /// </summary> /// <param name="obj">对象。</param> /// <returns>Decimal数值。</returns> public static decimal ToDecimal(object obj) { try { return decimal.Parse(ToObjectString(obj)); } catch { return -1M; } }/// <summary>
/// 将对象转换为数值(Decimal)类型。 /// </summary> /// <param name="obj">对象。</param> /// <param name="returnValue">转换失败返回该值。</param> /// <returns>Decimal数值。</returns> public static decimal ToDecimal(object obj,decimal returnValue) { try { return decimal.Parse(ToObjectString(obj)); } catch { return returnValue; } } /// <summary> /// 将对象转换为数值(Double)类型,转换失败返回-1。 /// </summary> /// <param name="obj">对象。</param> /// <returns>Double数值。</returns> public static double ToDouble(object obj) { try { return double.Parse(ToObjectString(obj)); } catch { return -1; } }/// <summary>
/// 将对象转换为数值(Double)类型。 /// </summary> /// <param name="obj">对象。</param> /// <param name="returnValue">转换失败返回该值。</param> /// <returns>Double数值。</returns> public static double ToDouble(object obj,double returnValue) { try { return double.Parse(ToObjectString(obj)); } catch { return returnValue; } } /// <summary> /// 将对象转换为数值(Float)类型,转换失败返回-1。 /// </summary> /// <param name="obj">对象。</param> /// <returns>Float数值。</returns> public static float ToFloat(object obj) { try { return float.Parse(ToObjectString(obj)); } catch { return -1; } }/// <summary>
/// 将对象转换为数值(Float)类型。 /// </summary> /// <param name="obj">对象。</param> /// <param name="returnValue">转换失败返回该值。</param> /// <returns>Float数值。</returns> public static float ToFloat(object obj,float returnValue) { try { return float.Parse(ToObjectString(obj)); } catch { return returnValue; } } /// <summary> /// 将对象转换为数值(DateTime)类型,转换失败返回Now。 /// </summary> /// <param name="obj">对象。</param> /// <returns>DateTime值。</returns> public static DateTime ToDateTime(object obj) { try { DateTime dt = DateTime.Parse(ToObjectString(obj)); if( dt > DateTime.MinValue && DateTime.MaxValue > dt) return dt; return DateTime.Now; } catch { return DateTime.Now; } }/// <summary>
/// 将对象转换为数值(DateTime)类型。 /// </summary> /// <param name="obj">对象。</param> /// <param name="returnValue">转换失败返回该值。</param> /// <returns>DateTime值。</returns> public static DateTime ToDateTime(object obj,DateTime returnValue) { try { DateTime dt = DateTime.Parse(ToObjectString(obj)); if( dt > DateTime.MinValue && DateTime.MaxValue > dt) return dt; return returnValue; } catch { return returnValue; } } /// <summary> /// 从Boolean转换成byte,转换失败返回0。 /// </summary> /// <param name="obj">对象。</param> /// <returns>Byte值。</returns> public static byte ToByteByBool( object obj ) { string text = ToObjectString(obj).Trim(); if( text == string.Empty) return 0; else { try { return (byte)(text.ToLower()=="true"?1:0); } catch { return 0; } } } /// <summary> /// 从Boolean转换成byte。 /// </summary> /// <param name="obj">对象。</param> /// <param name="returnValue">转换失败返回该值。</param> /// <returns>Byte值。</returns> public static byte ToByteByBool( object obj, byte returnValue ) { string text = ToObjectString(obj).Trim(); if( text == string.Empty) return returnValue; else { try { return (byte)(text.ToLower()=="true"?1:0); } catch { return returnValue; } } } /// <summary> /// 从byte转换成Boolean,转换失败返回false。 /// </summary> /// <param name="obj">对象。</param> /// <returns>Boolean值。</returns> public static bool ToBoolByByte( object obj ) { try { string s = ToObjectString(obj).ToLower(); return s == "1" || s== "true"?true:false; } catch { return false; } } /// <summary> /// 从byte转换成Boolean。 /// </summary> /// <param name="obj">对象。</param> /// <param name="returnValue">转换失败返回该值。</param> /// <returns>Boolean值。</returns> public static bool ToBoolByByte( object obj, bool returnValue ) { try { string s = ToObjectString(obj).ToLower(); return s == "1" || s== "true"?true:false; } catch { return returnValue; } } #endregion#region 数据判断
/// <summary> /// 判断文本obj是否为空值。 /// </summary> /// <param name="obj">对象。</param> /// <returns>Boolean值。</returns> public static bool IsEmpty(string obj) { return ToObjectString(obj).Trim() == String.Empty ? true : false; }/// <summary>
/// 判断对象是否为正确的日期值。 /// </summary> /// <param name="obj">对象。</param> /// <returns>Boolean。</returns> public static bool IsDateTime(object obj) { try { DateTime dt = DateTime.Parse(ToObjectString(obj)); if( dt > DateTime.MinValue && DateTime.MaxValue > dt) return true; return false; } catch { return false; } }/// <summary>
/// 判断对象是否为正确的Int32值。 /// </summary> /// <param name="obj">对象。</param> /// <returns>Int32值。</returns> public static bool IsInt(object obj) { try { int.Parse(ToObjectString(obj)); return true; } catch { return false; } }/// <summary>
/// 判断对象是否为正确的Long值。 /// </summary> /// <param name="obj">对象。</param> /// <returns>Long值。</returns> public static bool IsLong(object obj) { try { long.Parse(ToObjectString(obj)); return true; } catch { return false; } }/// <summary>
/// 判断对象是否为正确的Float值。 /// </summary> /// <param name="obj">对象。</param> /// <returns>Float值。</returns> public static bool IsFloat(object obj) { try { float.Parse(ToObjectString(obj)); return true; } catch { return false; } }/// <summary>
/// 判断对象是否为正确的Double值。 /// </summary> /// <param name="obj">对象。</param> /// <returns>Double值。</returns> public static bool IsDouble(object obj) { try { double.Parse(ToObjectString(obj)); return true; } catch { return false; } } /// <summary> /// 判断对象是否为正确的Decimal值。 /// </summary> /// <param name="obj">对象。</param> /// <returns>Decimal值。</returns> public static bool IsDecimal(object obj) { try { decimal.Parse(ToObjectString(obj)); return true; } catch { return false; } } #endregion#region 数据操作
/// <summary> /// 去除字符串的所有空格。 /// </summary> /// <param name="text">字符串</param> /// <returns>字符串</returns> public static string StringTrimAll( string text ) { string _text = ToObjectString(text); string returnText = String.Empty; char[] chars = _text.ToCharArray(); for( int i=0;i<chars.Length;i++) { if( chars[i].ToString() != string.Empty) returnText += chars[i].ToString(); } return returnText; }/// <summary>
/// 去除数值字符串的所有空格。 /// </summary> /// <param name="numricString">数值字符串</param> /// <returns>String</returns> public static string NumricTrimAll( string numricString ) { string text = ToObjectString(numricString).Trim(); string returnText = String.Empty; char[] chars = text.ToCharArray(); for( int i=0;i<chars.Length;i++) { if( chars[i].ToString() == "+" || chars[i].ToString() == "-" || IsDouble( chars[i].ToString()) ) returnText += chars[i].ToString(); } return returnText; }/// <summary>
/// 在数组中查找匹配对象类型 /// </summary> /// <param name="array">数组</param> /// <param name="obj">对象</param> /// <returns>Boolean</returns> public static bool ArrayFind(Array array,object obj) { bool b = false; foreach(object obj1 in array) { if(obj.Equals(obj1)) { b = true; break; } } return b; }/// <summary>
/// 在数组中查找匹配字符串 /// </summary> /// <param name="array">数组</param> /// <param name="obj">对象</param> /// <param name="unUpLower">是否忽略大小写</param> /// <returns>Boolean</returns> public static bool ArrayFind(Array array,string obj,bool unUpLower) { bool b = false; foreach(string obj1 in array) { if(!unUpLower) { if(obj.Trim().Equals(obj1.ToString().Trim())) { b = true; break; } } else { if(obj.Trim().ToUpper().Equals(obj1.ToString().Trim().ToUpper())) { b = true; break; } } } return b; } /// <summary> /// 替换字符串中的单引号。 /// </summary> /// <param name="inputString">字符串</param> /// <returns>String</returns> public static string ReplaceInvertedComma( string inputString ) { return inputString.Replace("'","''"); }/// <summary> /// 判断两个字节数组是否具有相同值. /// </summary> /// <param name="bytea">字节1</param> /// <param name="byteb">字节2</param> /// <returns>Boolean</returns> public static bool CompareByteArray(byte[] bytea,byte[] byteb) { if(null == bytea || null == byteb) { return false; } else { int aLength = bytea.Length; int bLength = byteb.Length; if(aLength != bLength) return false; else { bool compare = true; for(int index = 0; index < aLength; index++) { if(bytea[index].CompareTo(byteb[index]) != 0) { compare = false; break; } } return compare; } } }
/// <summary> /// 日期智能生成。 /// </summary> /// <param name="inputText">字符串</param> /// <returns>DateTime</returns> public static string BuildDate( string inputText ) { try { return DateTime.Parse( inputText ).ToShortDateString(); } catch { string text = NumricTrimAll( inputText ); string year = DateTime.Now.Year.ToString(); string month = DateTime.Now.Month.ToString(); string day = DateTime.Now.Day.ToString(); int length = text.Length; if( length == 0 ) return String.Empty; else { if( length<=2 ) day = text; else if( length<=4 ) { month = text.Substring(0,2); day = text.Substring(2,length-2); } else if( length<=6 ) { year = text.Substring(0,4); month = text.Substring(4,length-4); } else if( length>6) { year = text.Substring(0,4); month = text.Substring(4,2); day = text.Substring(6,length-6); } try { return DateTime.Parse( year+"-"+month+"-"+day ).ToShortDateString(); } catch { return String.Empty; } } } }
/// <summary>
/// 检查文件是否真实存在。 /// </summary> /// <param name="path">文件全名（包括路径）。</param> /// <returns>Boolean</returns> public static bool IsFileExists(string path) { try { return File.Exists(path); } catch { return false; } }/// <summary>
/// 检查目录是否真实存在。 /// </summary> /// <param name="path">目录路径.</param> /// <returns>Boolean</returns> public static bool IsDirectoryExists(string path) { try { return Directory.Exists(Path.GetDirectoryName(path)); } catch { return false; } } /// <summary> /// 查找文件中是否存在匹配行。 /// </summary> /// <param name="fi">目标文件.</param> /// <param name="lineText">要查找的行文本.</param> /// <param name="lowerUpper">是否区分大小写.</param> /// <returns>Boolean</returns> public static bool FindLineTextFromFile(FileInfo fi,string lineText,bool lowerUpper) { bool b = false; try { if(fi.Exists) { StreamReader sr=new StreamReader(fi.FullName); string g = ""; do { g=sr.ReadLine(); if(lowerUpper) { if(ToObjectString(g).Trim() == ToObjectString(lineText).Trim()) { b = true; break; } } else { if(ToObjectString(g).Trim().ToLower() == ToObjectString(lineText).Trim().ToLower()) { b = true; break; } } } while(sr.Peek()!=-1); sr.Close(); } } catch { b =false; } return b; } /// <summary> /// 判断父子级关系是否正确。 /// </summary> /// <param name="table">数据表。</param> /// <param name="columnName">子键列名。</param> /// <param name="parentColumnName">父键列名。</param> /// <param name="inputString">子键值。</param> /// <param name="compareString">父键值。</param> /// <returns></returns> public static bool IsRightParent(DataTable table,string columnName,string parentColumnName,string inputString,string compareString) { ArrayList array = new ArrayList(); SearchChild(array,table,columnName,parentColumnName,inputString,compareString); return array.Count == 0; }// 内部方法
private static void SearchChild(ArrayList array,DataTable table,string columnName,string parentColumnName,string inputString,string compareString) { DataView view = new DataView(table); view.RowFilter = parentColumnName+"='"+ReplaceInvertedComma(inputString.Trim())+"'";//找出所有的子类。 //查找表中的数据的ID是否与compareString相等，相等返回 false;不相等继续迭代。 for(int index = 0 ;index < view.Count;index ++) { if(Utility.ToObjectString(view[index][columnName]).ToLower() == compareString.Trim().ToLower()) { array.Add("1"); break; } else { SearchChild(array,table,columnName,parentColumnName,Utility.ToObjectString(view[index][columnName]),compareString); } } }#endregion
#region 日期
/// <summary>
/// 格式化日期类型，返回字符串 /// </summary> /// <param name="dtime">日期</param> /// <param name="s">日期年月日间隔符号</param> /// <returns></returns> public static String Fomatdate(DateTime dtime,String s) { String datestr=""; datestr=dtime.Year.ToString() + s + dtime.Month.ToString().PadLeft(2,'0')+ s +dtime.Day.ToString().PadLeft(2,'0'); return datestr; }/// <summary>
/// 返回日期差 /// </summary> /// <param name="sdmin">开始日期</param> /// <param name="sdmax">结束日期</param> /// <returns>日期差：负数为失败</returns> public static int Datediff(DateTime sdmin,DateTime sdmax) { try { double i=0; while(sdmin.AddDays(i)<sdmax) { i++; } return Utility.ToInt(i); } catch { return -1; } }/// <summary>
/// 返回日期差 /// </summary> /// <param name="sdmin">开始日期</param> /// <param name="sdmax">结束日期</param> /// <returns>日期差：负数为失败</returns> public static int Datediff(String sdmin,String sdmax) { try { DateTime dmin; DateTime dmax; dmin=DateTime.Parse(sdmin); dmax=DateTime.Parse(sdmax); double i=0; while(dmin.AddDays(i)<dmax) { i++; } return Utility.ToInt(i); } catch { return -1; } }#endregion
#region 转换用户输入
/// <summary>
/// 将用户输入的字符串转换为可换行、替换Html编码、无危害数据库特殊字符、去掉首尾空白、的安全方便代码。 /// </summary> /// <param name="inputString">用户输入字符串</param> public static string ConvertStr(string inputString) { string retVal=inputString; //retVal=retVal.Replace("&","&"); retVal=retVal.Replace("\"","""); retVal=retVal.Replace("<","<"); retVal=retVal.Replace(">",">"); retVal=retVal.Replace(" "," "); retVal=retVal.Replace(" "," "); retVal=retVal.Replace("\t"," "); retVal=retVal.Replace("\r", "<br>"); return retVal; }public static string InputText(string inputString)
{ string retVal=inputString; retVal= ConvertStr(retVal); retVal=retVal.Replace("[url]", ""); retVal=retVal.Replace("[/url]", ""); return retVal; } /// <summary> /// 将html代码显示在网页上 /// </summary> /// <param name="inputString"></param> /// <returns></returns> public static string OutputText(string inputString) { string retVal=System.Web.HttpUtility.HtmlDecode(inputString); retVal=retVal.Replace("<br>",""); retVal=retVal.Replace("&","&;"); retVal=retVal.Replace(""","\""); retVal=retVal.Replace("<","<"); retVal=retVal.Replace(">",">"); retVal=retVal.Replace(" "," "); retVal=retVal.Replace(" "," "); return retVal; }public static string ToUrl(string inputString)
{ string retVal=inputString; retVal= ConvertStr(retVal); return Regex.Replace(retVal,@"\[url](?<x>[^\]]*)\[/url]",@"<a href=""$1"" target=""_blank"">$1</a>",RegexOptions.IgnoreCase); }public static string GetSafeCode(string str)
{ str=str.Replace("'",""); str=str.Replace(char.Parse("34"),' '); str=str.Replace(";",""); return str; }#endregion
//#region 弹出框
/ <summary>
/ 服务器端弹出alert对话框 / </summary> / <param name="str_Message">提示信息,例子："请输入您姓名!"</param> / <param name="page">Page类</param> //public static void Alert(string str_Message,Page page) //{ // page.RegisterStartupScript("","<script>alert('"+str_Message+"');</script>"); //} / <summary> / 服务器端弹出alert对话框 / </summary> / <param name="str_Ctl_Name">获得焦点控件Id值,比如：txt_Name</param> / <param name="str_Message">提示信息,例子："请输入您姓名!"</param> / <param name="page">Page类</param> //public static void Alert(string str_Ctl_Name,string str_Message,Page page) //{ // page.RegisterStartupScript("","<script>alert('"+str_Message+"');document.forms(0)."+str_Ctl_Name+".focus(); document.forms(0)."+str_Ctl_Name+".select();</script>"); //} / <summary> / 服务器端弹出confirm对话框,该函数有个弊端,必须放到响应事件的最后,目前没有妥善解决方案 / </summary> / <param name="str_Message">提示信息,例子："您是否确认删除!"</param> / <param name="btn">隐藏Botton按钮Id值,比如：btn_Flow</param> / <param name="page">Page类</param> //public static void Confirm(string str_Message,string btn,Page page) //{ // page.RegisterStartupScript("","<script> if (confirm('"+str_Message+"')==true){document.forms(0)."+btn+".click();}</script>"); //} / <summary> / 服务器端弹出confirm对话框,询问用户准备转向相应操作，包括“确定”和“取消”时的操作 / </summary> / <param name="str_Message">提示信息，比如："成功增加数据,单击\"确定\"按钮填写流程,单击\"取消\"修改数据"</param> / <param name="btn_Redirect_Flow">"确定"按钮id值</param> / <param name="btn_Redirect_Self">"取消"按钮id值</param> / <param name="page">Page类</param> //public static void Confirm(string str_Message,string btn_Redirect_Flow,string btn_Redirect_Self,Page page) //{ // page.RegisterStartupScript("","<script> if (confirm('"+str_Message+"')==true){document.forms(0)."+btn_Redirect_Flow+".click();}else{document.forms(0)."+btn_Redirect_Self+".click();}</script>"); //}//#endregion
/// <summary> /// 设置绑定到DataGrid的DataTable的记录行数，如不够则添加空行 /// </summary> /// <param name="myDataTable">数据表</param> /// <param name="intPageCount">DataGrid分页时每页行数</param> public static void SetTableRows(DataTable myDataTable,int intPageCount) { try { int intTemp=myDataTable.Rows.Count%intPageCount; if ((myDataTable.Rows.Count==0) || (intTemp!=0)) { for(int i=0;i<(intPageCount-intTemp);i++) { DataRow myDataRow=myDataTable.NewRow(); myDataTable.Rows.Add(myDataRow); } } } catch { throw; } } public static string GetGuid(string guid) { return guid.Replace("-", ""); }public static string ReadConfig(string filePath)
{ return System.Configuration.ConfigurationManager.AppSettings[filePath]; }#region 字符串长度区分中英文截取
/// <summary> /// 截取文本，区分中英文字符，中文算两个长度，英文算一个长度 /// </summary> /// <param name="str">待截取的字符串</param> /// <param name="length">需计算长度的字符串</param> /// <returns>string</returns> public static string GetSubString(string str, int length) { string temp = str; int j = 0; int k = 0; for (int i = 0; i < temp.Length; i++) { if (Regex.IsMatch(temp.Substring(i, 1), @"[\u4e00-\u9fa5]+")) { j += 2; } else { j += 1; } if (j <= length) { k += 1; } if (j > length) { return temp.Substring(0, k) + "..."; } } return temp; } #endregion }}//该代码片段来自于: