C# 识别url是否是网络路径

#region 识别urlStr是否是网络路径 

      /// <summary> 

      /// 识别urlStr是否是网络路径 

      /// </summary> 

      /// <param name="urlStr"> 

      /// <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