C#测试网络链接状态

 

网络判断网络连接有多种办法，通过C#程序也可以判断与远程主机的连接状态。具体实现方法
  
    

   
     
public string NetStatus()

                {

                        ManagementObjectCollection objects;

                        string status = "";

                        ManagementObjectSearcher searcher = new ManagementObjectSearcher();

                        searcher.Query.QueryString = "Select * From Win32_NetworkAdapter ";

                        objects = searcher.Get();

                        foreach(ManagementObject obj in objects)

                        {

                                foreach(PropertyData p in obj.Properties)

                                {

                                        if(p.Name.Equals("NetConnectionStatus"))

                                        {

                                                if(p.Value!=null)

                                                {

                                                        status = p.Value.ToString();

                                                }

                                        }

                                }

                        }

                        switch(status)

                        {

                                case "0":

                                        return "Disconnected";

                                case "1":

                                        return "Connecting ...";

                                case "2":

                                        return "Connected";

                                case "3":

                                        return "Disconnecting ...";

                                case "4":

                                        return "Hardware not present";

                                case "5":

                                        return "Hardware disabled";

                                case "6":

                                        return "Hardware malfunction";

                                case "7":

                                        return "Media disconnected";

                                case "8":

                                        return "Authenticating";

                                case "9":

                                        return "Authentication succeeded";

                                case "10":

                                        return "Authentication failed";

                                default:

                                        return "";

                        }

                }