C# 判斷是否可以連接服務器?

判斷是否可以連接服務器?

 

 
          private  
          static  
          bool IsCanConnect( 
          string url) 
          
{ 
          
            HttpWebRequest req =  
          null; 
          
            HttpWebResponse res =  
          null; 
          
             
          bool CanCn =  
          true;    
          // 
          設成可以連接；  
          
             
          try 
          
            { 
          
                req = (HttpWebRequest)WebRequest.Create(url); 
          
                res = (HttpWebResponse)req.GetResponse(); 
          
            } 
          
             
          catch (Exception) 
          
            { 
          
                CanCn =  
          false;    
          // 
          無法連接  
          
            } 
          
             
          finally 
          
            { 
          
                 
          if (res !=  
          null) 
          
                { 
          
                    res.Close(); 
          
                } 
          
            } 
          
             
          return CanCn; 
          
}