在主页中,我使用了registerForNetworkStatusChangeNotif()函数( which I borrowed from MSDN)来注册网络通知更改.该函数添加了一个事件监听器networkstatuschanged,它可以单独用于该页面,即连接中断时显示错误,并在连接恢复时自动刷新页面 –

var networkInfo = Windows.Networking.Connectivity.networkinformation;
…
networkInfo.addEventListener(“networkstatuschanged”,onNetworkStatusChange);

我应该如何处理其他页面的Internet可用性检查？

我已经尝试在default.js中注册此函数,以便它可用于所有页面.我的应用程序使用Geolocation功能和statuschanged事件与networkstatuschanged事件冲突,我的应用程序无法显示Internet连接错误的丢失.如何解决此问题,以便正确处理Internet连接的不可用性.

你需要听一个特定的事件.当它发射时,你检查互联网连接.

var networkinformation = Windows.Networking.Connectivity.networkinformation;
...

ready: function(element,options)
{
   // Registering for connection change
   networkinformation.addEventListener("networkstatuschanged",this.onNetworkStatusChanged);
   ...
}

unload: function()
{
   // Unregistering for connection change
   networkinformation.removeEventListener("networkstatuschanged",this.onNetworkStatusChanged);
   ...
}

onNetworkStatusChanged: function(eventArgs)
{
    // Retrieve the InternetConnectionProfile
    var internetConnectionProfile = networkinformation.getInternetConnectionProfile();
    // Accesses the NetworkConnectivityLevel
    var networkConnectivityLevel = internetConnectionProfile.getNetworkConnectivityLevel();
    // Switch on NetworkConnectivityLevel
    switch (networkConnectivityLevel) {
        case Windows.Networking.Connectivity.NetworkConnectivityLevel.none:
           ...
        case Windows.Networking.Connectivity.NetworkConnectivityLevel.localAccess:
           ...
        case Windows.Networking.Connectivity.NetworkConnectivityLevel.constrainedInternetAccess:
           ...
        case Windows.Networking.Connectivity.NetworkConnectivityLevel.internetAccess:
           ...
    }
    ...
}

我正在开发在线应用程序. [问题]当互联网停机或不可用时,它给我错误[强制关闭],我试图使用broadCast接收器处理但不满足精确解决方案,寻找更好的解决方案.

public class MybroadcastReceiver extends broadcastReceiver {

@Override
public void onReceive(final Context context,final Intent intent) {

    NetworkInfo info = intent
            .getParcelableExtra(ConnectivityManager.EXTRA_NETWORK_INFO);

    if (null != info) {

        String state = info.getState().toString();

        if (state.equalsIgnoreCase("CONNECTED")) {
            SplashScreen.isWiFiConnected = true;
            Log.i("isWifiConnected","=================TRUE");
        } else {
            SplashScreen.isWiFiConnected = false;
            Log.i("isWifiConnected","=================FALSE");
        }

    }

}

}

谢谢.

static String data = null;
private static HttpPost httppost;
private static HttpParams httpParameters;
private static int timeoutConnection = 30000;
private static HttpClient httpclient = null;
private static HttpResponse response = null;
private static int responseCode=0;
public static ConnectivityManager mConnectivityManager;
public static NetworkInfo mNetworkInfo;
public static boolean isNetError=false;

/** Post Http data and returns final string and status on network */

public static void postHttp(String Url,Activity mActivity) {
try {
    isNetError=false;

    mConnectivityManager= (ConnectivityManager) mActivity.getSystemService(Context.CONNECTIVITY_SERVICE);
    mNetworkInfo = mConnectivityManager.getActiveNetworkInfo();

    if (mNetworkInfo != null && mNetworkInfo.isConnectedOrConnecting())
    {
        httppost = new HttpPost(Url);
        httpParameters = new BasicHttpParams();
        httpconnectionParams.setSoTimeout(httpParameters,timeoutConnection);
        httpclient = new DefaultHttpClient(httpParameters);

        List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
        nameValuePairs.add(new BasicNameValuePair("text","some Text"));


        httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs,HTTP.UTF_8));

        // Execute HTTP Post Request
        response = httpclient.execute(httppost);
        data = EntityUtils.toString(response.getEntity());

    }
    else
        isNetError=true;

    } catch (Exception e) {
        e.printstacktrace();
        isNetError=true;
        }

   if (responseCode == 200)
   {
        isNetError=false;
        System.out.println("final..." + data);
        }
        else
            isNetError=true;
    }

在asyntask的doInBackground()中调用此方法,并在onPostExecute()中检查isNetError值,并在添加权限的其他答案中提及< uses-permission android：name =“android.permission.ACCESS_NETWORK_STATE”/>

if(isNetError)
//No internet 
else
//do your stuff

我使用VS2015将通用应用程序部署到运行 Windows 10 IOT Core(10.0.10240)的RaspBerry Pi 2 Model B.使用HttpClient调用WebService或检索如下的一些数据

HttpClient client = new HttpClient();
var re = await client.GetAsync("http://somehost/api/values/5");

从HRESULT产生一个异常：0x80072EFD.

功能

>互联网(客户端)
>互联网(客户端和服务器)
>专用网络(客户端和服务器)

在应用清单中设置.有什么建议？

遇到了0x80072efd问题.似乎是代理设置出错的东西.以下对我有用(来自admin命令提示符)：

netsh winhttp重置代理

我有一个用c#编写的 windows / WPF应用程序.这个应用程序连接到托管在我们公共服务器上的远程数据库.应用程序将安装到所有系统.用户可以通过此应用程序将值添加到数据库.
当有人向数据库添加任何值时,我需要一个通知机制来向所有已安装的 Windows应用程序发送通知.

请告诉我实施此方案的最佳方法.

提前致谢.

您可以使用sql Server的“查询通知”功能,该功能允许在数据发生更改时通知应用程序.

请参阅以下链接.

http://support.microsoft.com/kb/555893?wa=wsignin1.0