C# 判断是否可以连接服务器?

判断是否可以连接服务器?

 

 
  private  
  static  
  bool IsCanConnect( 
  string url) 
  
{ 
  
            HttpWebRequest req =  
  null; 
  
            HttpWebResponse res =  
  null; 
  
             
  bool CanCn =  
  true;    
  // 
  设成可以连接；  
  
             
  try 
  
            { 
  
                req = (HttpWebRequest)WebRequest.Create(url); 
  
                res = (HttpWebResponse)req.GetResponse(); 
  
            } 
  
             
  catch (Exception) 
  
            { 
  
                CanCn =  
  false;    
  // 
  无法连接  
  
            } 
  
             
  finally 
  
            { 
  
                 
  if (res !=  
  null) 
  
                { 
  
                    res.Close(); 
  
                } 
  
            } 
  
             
  return CanCn; 
  
}