Develop Windows 8-determine the network connection status

If the current network is not connected, an exception is thrown when you directly use postasync in httpclient to initiate a data request.

Therefore, the network status should be determined before network data interaction. If the Network is available, perform the network data request operation.

In Windows 8 API, you can use the networkconnectivitylevel interface to obtain the network status.

The Code is as follows:

/// <Summary> /// provides network-related data settings or retrieval functions // </Summary> public class networkhelper {public static bool isconnectedtointernet () {bool isconnected = false; connectionprofile CP = networkinformation. getinternetconnectionprofile (); If (CP! = NULL) {networkconnectivitylevel Cl = CP. getnetworkconnectivitylevel (); isconnected = (CL = networkconnectivitylevel. internetaccess);} return isconnected ;}}

This can be implemented as follows:

Httpclient = new httpclient (); If (networkhelper. isconnectedtointernet () {httpresponsemessage response = await httpclient. postasync (New uri (serveruri), new stringcontent (postdata); If (response. statuscode = httpstatuscode. OK) {// todo: processing the returned result }//...}