ASP.NET字符串通用代码

using System;
using System.Text;
using System.Text.RegularExpressions;

namespace My.Utils
{
 /// <summary>
 /// 字符串通用工具
 /// </summary>
 public class StringUtils
 {
  /// <summary>
  /// 随机生成字符串源
  /// </summary>
  public const string RANDOM_STRING_SOURCE = "0123456789abcdefghijklmnopqrstuvwxyz";

  public StringUtils()
  {
  }

  /// <summary>
  /// 替换字符串
  /// </summary>
  /// <param name="src">要修改的字符串</param>
  /// <param name="pattern">要匹配的正则表达式模式</param>
  /// <param name="replacement">替换字符串</param>
  /// <returns>已修改的字符串</returns>
  public static string Replace (string src, string pattern, string replacement)
  {
   return Replace(src, pattern, replacement, RegexOptions.None);
  }

  /// <summary>
  /// 替换字符串,不区分大小写
  /// </summary>
  /// <param name="src">要修改的字符串</param>
  /// <param name="pattern">要匹配的正则表达式模式</param>
  /// <param name="replacement">替换字符串</param>
  /// <returns>已修改的字符串</returns>
  public static string ReplaceIgnoreCase (string src, string pattern, string replacement)
  {
   return Replace(src, pattern, replacement, RegexOptions.IgnoreCase);
  }

  /// <summary>
  /// 替换字符串
  /// </summary>
  /// <param name="src">要修改的字符串</param>
  /// <param name="pattern">要匹配的正则表达式模式</param>
  /// <param name="replacement">替换字符串</param>
  /// <param name="options">匹配模式</param>
  /// <returns>已修改的字符串</returns>
  public static string Replace (string src, string pattern, string replacement, RegexOptions options)
  {
   Regex regex = new Regex(pattern, optionsRegexOptions.Compiled);

   return regex.Replace(src, replacement);
  }

  /// <summary>
  /// 删除字符串中指定的内容
  /// </summary>

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