正则表达式截取字符串的方法技巧

int a = Convert.ToInt32(txt1.Text.Trim().Replace('[', ']').Split(']')[1]);   string b = txt1.Text.Trim().Replace('[', ']').Split(']')[2]; 

string str = "[数字]字符串";Regex reg = new Regex(@"([^]+)/](.*)");string a= Convert.ToInt32( reg.Match(str).Groups[1].Value);string b= Convert.ToInt32( reg.Match(str).Groups[2].Value);

string tempStr = "[数字]字符串"; string pattern = @"([/s§]∗)([/s/S]*)";Regex re = new Regex(pattern); string str1 = Regex.Replace(tempStr,pattern,"$1"); string str2 = Regex.Replace(tempStr, pattern, "$2");

  /// <summary>  /// 返回一个字符串数组  /// </summary>  /// <param name="str"></param>  /// <returns></returns>  public string[] ReturnIDAndName(string str)  {        string[] stringArray = new string[2];        Regex reg = new Regex(@"([^]+)/](.*)");    stringArray[0]= reg.Match(str).Groups[1].Value;    stringArray[1] = reg.Match(str).Groups[2].Value;        return stringArray;  }    /// <summary>  /// 截取字符串编号  /// </summary>  public int ReturnId(string str)  {    try    {      if (string.IsNullOrEmpty(str))      {        return 0;      }      Regex regex = new Regex("(?<=//[)//d+(?=//])");      Match m = regex.Match(str);      int pid;      if (!m.Success)      {        pid = int.Parse("[" + regex.Match(str).Value + "]");      }      return int.Parse(regex.Match(str).Value);    }    catch    {      return 0;    }  }