正則表達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 = "[數字]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 = "[數字]字符串";   string pattern = @"  ([s§]∗)  ([sS]*)";  Regex re = new Regex(pattern);   string str1 = Regex.Replace(tempStr,pattern,"$1");   string str2 = Regex.Replace(tempStr, pattern, "$2");

    /// <summary>    /// 返回一個字符串數組    /// </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>    /// 截取字符串編號    /// </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;      }    }