C# 識別url是否是網絡路徑

    #region 識別urlStr是否是網絡路徑

          /// <summary>

          /// 識別urlStr是否是網絡路徑

          /// </summary>

          /// <param name="urlStr"></param>

          /// <returns></returns>

          public static bool UrlDiscern(string urlStr)

          {

              if (Regex.IsMatch(urlStr, @"((http|ftp|https)://)(([a-zA-Z0-9.-]+.[a-zA-Z]{2,6})|([0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}))(:[0-9]{1,4})*(/[a-zA-Z0-9\&%./-~-]*)?"))

              {

                  return true;

              }

              else

              {

                  return false;

              }

          }


      #endregion  </pre>