.NET字符串操作类StringHelper (C#版)
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
namespace Common
{
/// <summary>
/// 字符串操作类
/// </summary>
public class StringHelper
{
public StringHelper()
{
}
/// <summary>
/// 出错时弹出提示对话框
/// </summary>
/// <param name="str_Control_Name">检验控件id值</param>
/// <param name="str_Form_Name">表单id值</param>
/// <param name="str_Prompt">提示信息</param>
/// <returns>string</returns>
public static string JsIsNull(string str_Control_Name, string str_Form_Name, string str_Prompt)
{
return "<script language=\"javascript\">alert('" + str_Prompt + "');document." + str_Form_Name + "." + str_Control_Name + ".focus(); document." + str_Form_Name + "." + str_Control_Name + ".select();</" + "script>";
}
/// <summary>
/// 出错时弹出提示对话框
/// </summary>
/// <param name="str_Prompt">提示信息</param>
/// <returns>string</returns>
public static string JsIsNull(string str_Prompt)
{
return "<script language=\"javascript\">alert('" + str_Prompt + "');</" + "script>";
}
/// <summary>
/// 关闭对话框
/// </summary>
/// <param name="str_Prompt">提示信息</param>
/// <returns>string</returns>
public static string CloseParent(string str_Prompt)
{
return "<script language=\"javascript\">alert('" + str_Prompt + "');window.parent.close();</" + "script>";
}
/// <summary>
/// 出错时弹出提示对话框--关闭窗口
/// </summary>
/// <param name="str_Prompt">提示信息</param>
/// <param name="isReLoad">true为上个窗口自动刷新</param>
/// <returns>string</returns>
public static string JsIsNull(string str_Prompt, bool isReLoad)
{
if (isReLoad)
{
return "<script language=\"javascript\">alert('" + str_Prompt + "');opener.window.document.location.reload();window.close();</" + "script>";
}
else
{
return "<script language=\"javascript\">alert('" + str_Prompt + "');window.close();</" + "script>";
}
}
/// <summary>
///是否关闭窗口
/// </summary>
/// <param name="str_Prompt">提示信息</param>
/// <param name="isClose">true为关闭</param>
/// <returns>string</returns>
public static string JsIsClose(string str_Prompt, bool isClose)
{
if (!isClose)
{
return "<script language=\"javascript\">alert('" + str_Prompt + "');</" + "script>";
}
else
{
return "<script language=\"javascript\">alert('" + str_Prompt + "');window.close();opener.window.document.location.reload();</" + "script>";
}
}
/// <summary>
/// 弹出信息并重装窗口
/// </summary>
/// <param name="str_Prompt">提示信息</param>
/// <param name="reLoadPath">重装路径</param>
/// <returns>string</returns>
public static string JsIsReLoad(string str_Prompt, string reLoadPath)
{
return "<script language=\"javascript\">alert('" + str_Prompt + "');this.window.document.location.reload('" + reLoadPath + "');</" + "script>";
}
/// <summary>
/// 重装窗口
/// </summary>
/// <param name="reLoadPath">提示信息</param>
/// <returns>string</returns>
public static string JsIsReLoad(string reLoadPath)
{
return "<script language=\"javascript\">this.window.document.location.reload('" + reLoadPath + "');</" + "script>";
}
/// <summary>
/// 获得一个16位时间随机数
/// </summary>
/// <returns>返回随机数</returns>
public static string GetDataRandom()
{
string strData = DateTime.Now.ToString();
strData = strData.Replace(":", "");
strData = strData.Replace("-", "");
strData = strData.Replace(" ", "");
Random r = new Random();
strData = strData + r.Next(100000);
return strData;
}
/// <summary>
/// 获得某个字符串在另个字符串中出现的次数
/// </summary>
/// <param name="strOriginal">要处理的字符</param>
/// <param name="strSymbol">符号</param>
/// <returns>返回值</returns>
public static int GetStrCount(string strOriginal, string strSymbol)
{
int count = 0;
for (int i = 0; i < (strOriginal.Length - strSymbol.Length + 1); i++)
{
if (strOriginal.Substring(i, strSymbol.Length) == strSymbol)
{
count = count + 1;
}
}
return count;
}
/// <summary>
/// 获得某个字符串在另个字符串第一次出现时前面所有字符
/// </summary>
/// <param name="strOriginal">要处理的字符</param>
/// <param name="strSymbol">符号</param>
/// <returns>返回值</returns>
public static string GetFirstStr(string strOriginal, string strSymbol)
{
int strPlace = strOriginal.IndexOf(strSymbol);
if (strPlace != -1)
strOriginal = strOriginal.Substring(0, strPlace);
return strOriginal;
}
/// <summary>
/// 获得某个字符串在另个字符串最后一次出现时后面所有字符
/// </summary>
/// <param name="strOriginal">要处理的字符</param>
/// <param name="strSymbol">符号</param>
/// <returns>返回值</returns>
public static string GetLastStr(string strOriginal, string strSymbol)
{
int strPlace = strOriginal.LastIndexOf(strSymbol) + strSymbol.Length;
strOriginal = strOriginal.Substring(strPlace);
return strOriginal;
}
/// <summary>
/// 获得两个字符之间第一次出现时前面所有字符
/// </summary>
/// <param name="strOriginal">要处理的字符</param>
/// <param name="strFirst">最前哪个字符</param>
/// <param name="strLast">最后哪个字符</param>
/// <returns>返回值</returns>
public static string GetTwoMiddleFirstStr(string strOriginal, string strFirst, string strLast)
{
strOriginal = GetFirstStr(strOriginal, strLast);
strOriginal = GetLastStr(strOriginal, strFirst);
return strOriginal;
}
/// <summary>
/// 获得两个字符之间最后一次出现时的所有字符
/// </summary>
/// <param name="strOriginal">要处理的字符</param>
/// <param name="strFirst">最前哪个字符</param>
/// <param name="strLast">最后哪个字符</param>
/// <returns>返回值</returns>
public static string GetTwoMiddleLastStr(string strOriginal, string strFirst, string strLast)
{
strOriginal = GetLastStr(strOriginal, strFirst);
strOriginal = GetFirstStr(strOriginal, strLast);
return strOriginal;
}
/// <summary>
/// 从数据库表读记录时,能正常显示
/// </summary>
/// <param name="strContent">要处理的字符</param>
/// <returns>返回正常值</returns>
public static string GetHtmlFormat(string strContent)
{
strContent = strContent.Trim();
if (strContent == null)
{
return "";
}
strContent = strContent.Replace("<", "<");
strContent = strContent.Replace(">", ">");
strContent = strContent.Replace("\n", "<br />");
return (strContent);
}
/// <summary>
/// 检查相等之后，获得字符串
/// </summary>
/// <param name="str">字符串1</param>
/// <param name="checkStr">字符串2</param>
/// <param name="reStr">相等之后要返回的字符串</param>
/// <returns>返回字符串</returns>
public static string GetCheckStr(string str, string checkStr, string reStr)
{
if (str == checkStr)
{
return reStr;
}
return "";
}
/// <summary>
/// 检查相等之后，获得字符串
/// </summary>
/// <param name="str">数值1</param>
/// <param name="checkStr">数值2</param>
/// <param name="reStr">相等之后要返回的字符串</param>
/// <returns>返回字符串</returns>
public static string GetCheckStr(int str, int checkStr, string reStr)
{
if (str == checkStr)
{
return reStr;
}
return "";
}
/// <summary>
/// 检查相等之后，获得字符串
/// </summary>
/// <param name="str"></param>
/// <param name="checkStr"></param>
/// <param name="reStr"></param>
/// <returns></returns>
public static string GetCheckStr(bool str, bool checkStr, string reStr)
{
if (str == checkStr)
{
return reStr;
}
return "";
}
/// <summary>
/// 检查相等之后，获得字符串
/// </summary>
/// <param name="str"></param>
/// <param name="checkStr"></param>
/// <param name="reStr"></param>
/// <returns></returns>
public static string GetCheckStr(object str, object checkStr, string reStr)
{
if (str == checkStr)
{
return reStr;
}
return "";
}
/// <summary>
/// 截取左边规定字数字符串,超过字数用endStr结束
/// </summary>
/// <param name="str">需截取字符串</param>
/// <param name="length">截取字数</param>
/// <param name="endStr">超过字数，结束字符串，如"..."</param>
/// <returns>返回截取字符串</returns>
public static string GetLeftStr(string str, int length, string endStr)
{
string reStr;
if (length < GetStrLength(str))
{
reStr = str.Substring(0, length) + endStr;
}
else
{
reStr = str;
}
return reStr;
}
/// <summary>
/// 截取左边规定字数字符串,超过字数用...结束
/// </summary>
/// <param name="str">需截取字符串</param>
/// <param name="length">截取字数</param>
/// <returns>返回截取字符串</returns>
public static string GetLeftStr(string str, int length)
{
string reStr;
if (length < str.Length)
{
reStr = str.Substring(0, length) + "...";
}
else
{
reStr = str;
}
return reStr;
}
/// <summary>
/// 截取左边规定字数字符串,超过字数用...结束
/// </summary>
/// <param name="str">需截取字符串</param>
/// <param name="length">截取字数</param>
/// <param name="subcount">若超过字数右边减少的字符长度</param>
/// <returns>返回截取字符串</returns>
public static string GetLeftStr(string str, int length,int subcount)
{
string reStr;
if (length < str.Length)
{
reStr = str.Substring(0, length-subcount) + "...";
}
else
{
reStr = str;
}
return reStr;
}
/// <summary>
/// 获得双字节字符串的字节数
/// </summary>
/// <param name="str">要检测的字符串</param>
/// <returns>返回字节数</returns>
public static int GetStrLength(string str)
{
ASCIIEncoding n = new ASCIIEncoding();
byte[] b = n.GetBytes(str);
int l = 0; // l 为字符串之实际长度
for (int i = 0; i < b.Length; i++)
{
if (b[i] == 63) //判断是否为汉字或全脚符号
{
l++;
}
l++;
}
return l;
}
/// <summary>
/// 剥去HTML标签
/// </summary>
/// <param name="text">带有HTML格式的字符串</param>
/// <returns>string</returns>
public static string RegStripHtml(string text)
{
string reStr;
string RePattern = @"<\s*(\S+)(\s[^>]*)?>";
reStr = Regex.Replace(text, RePattern, string.Empty, RegexOptions.Compiled);
reStr = Regex.Replace(reStr, @"\s+", string.Empty, RegexOptions.Compiled);
return reStr;
}
/// <summary>
/// 使Html失效,以文本显示
/// </summary>
/// <param name="str">原字符串</param>
/// <returns>失效后字符串</returns>
public static string ReplaceHtml(string str)
{
str = str.Replace("<", "<");
return str;
}
/// <summary>
/// 获得随机数字
/// </summary>
/// <param name="Length">随机数字的长度</param>
/// <returns>返回长度为 Length 的 <see cref="System.Int32"/> 类型的随机数</returns>
/// <example>
/// Length 不能大于9,以下为示例演示了如何调用 GetRandomNext：<br />
/// <code>
/// int le = GetRandomNext(8);
/// </code>
/// </example>
public static int GetRandomNext(int Length)
{
if (Length > 9)
throw new System.IndexOutOfRangeException("Length的长度不能大于10");
Guid gu = Guid.NewGuid();
string str = "";
for (int i = 0; i < gu.ToString().Length; i++)
{
if (isNumber(gu.ToString()[i]))
{
str += ((gu.ToString()[i]));
}
}
int guid = int.Parse(str.Replace("-", "").Substring(0, Length));
if (!guid.ToString().Length.Equals(Length))
guid = GetRandomNext(Length);
return guid;
}
/// <summary>
/// 返回一个 bool 值，指明提供的值是不是整数
/// </summary>
/// <param name="obj">要判断的值</param>
/// <returns>true[是整数]false[不是整数]</returns>
/// <remarks>
/// isNumber 只能判断正(负)整数，如果 obj 为小数则返回 false;
/// </remarks>
/// <example>
/// 下面的示例演示了判断 obj 是不是整数：<br />
/// <code>
/// bool flag;
/// flag = isNumber("200");
/// </code>
/// </example>
public static bool isNumber(object obj)
{
//为指定的正则表达式初始化并编译 Regex 类的实例
System.Text.RegularExpressions.Regex rg = new System.Text.RegularExpressions.Regex(@"^-?(\d*)$");
//在指定的输入字符串中搜索 Regex 构造函数中指定的正则表达式匹配项
System.Text.RegularExpressions.Match mc = rg.Match(obj.ToString());
//指示匹配是否成功
return (mc.Success);
}
/// <summary>
/// 高亮显示
/// </summary>
/// <param name="str">原字符串</param>
/// <param name="findstr">查找字符串</param>
/// <param name="cssclass">Style</param>
/// <returns>string</returns>
public static string OutHighlightText(string str, string findstr, string cssclass)
{
if (findstr != "")
{
string text1 = "<span class=\"" + cssclass + "\">%s</span>";
str = str.Replace(findstr, text1.Replace("%s", findstr));
}
return str;
}
/// <summary>
/// 移除字符串首尾某些字符
/// </summary>
/// <param name="strOriginal">要操作的字符串</param>
/// <param name="startStr">要在字符串首部移除的字符串</param>
/// <param name="endStr">要在字符串尾部移除的字符串</param>
/// <returns>string</returns>
public static string RemoveStartOrEndStr(string strOriginal, string startStr,string endStr)
{
char[] start=startStr.ToCharArray();
char[] end=endStr.ToCharArray();
return strOriginal.TrimStart(start).TrimEnd(end);
}
/// <summary>
/// 删除指定位置指定长度字符串
/// </summary>
/// <param name="strOriginal">要操作的字符串</param>
/// <param name="startIndex">开始删除字符的位置</param>
/// <param name="count">要删除的字符数</param>
/// <returns>string</returns>
public static string RemoveStr(string strOriginal,int startIndex, int count)
{
return strOriginal.Remove(startIndex, count);
}
/// <summary>
/// 从左边填充字符串
/// </summary>
/// <param name="strOriginal">要操作的字符串</param>
/// <param name="totalWidth">结果字符串中的字符数</param>
/// <param name="paddingChar">填充的字符</param>
/// <returns>string</returns>
public static string LeftPadStr(string strOriginal, int totalWidth, char paddingChar)
{
if(strOriginal.Length<totalWidth)
return strOriginal.PadLeft(totalWidth, paddingChar);
return strOriginal;
}
/// <summary>
/// 从右边填充字符串
/// </summary>
/// <param name="strOriginal">要操作的字符串</param>
/// <param name="totalWidth">结果字符串中的字符数</param>
/// <param name="paddingChar">填充的字符</param>
/// <returns>string</returns>
public static string RightPadStr(string strOriginal, int totalWidth, char paddingChar)
{
if (strOriginal.Length < totalWidth)
return strOriginal.PadRight(totalWidth, paddingChar);
return strOriginal;
}
}
}