c#字符串函数

string[] arr = Regex.Split("", "", RegexOptions.IgnoreCase);   //字符串分割



///字符串中查找
public static string MidStrEx(string sourse, string startstr, string endstr)
        {
            string result = string.Empty;
            int startindex, endindex;
            try
            {
                startindex = sourse.IndexOf(startstr);
                if (startindex == -1)
                    return result;
                string tmpstr = sourse.Substring(startindex + startstr.Length);
                endindex = tmpstr.IndexOf(endstr);
                if (endindex == -1)
                    return result;
                result = tmpstr.Remove(endindex);
            }
            catch (Exception ex)
            {
                Console.Write("错误:" + ex.Message);
            }
            return result;
        }

///延时操作
System.Threading.Thread.Sleep(1000);