CODEWITHSUNDEEP
c#windows-phone-7webclient
Sebastian Graf
Sebastian Graf

Reputation: 3740

WebException on first run: NotFound

When I execute the following code on the dispatcher thread, my windows phone app throws WebException exception each time I start to debug with a fresh emulator:

public MainPage()
{
    InitializeComponent();
    Dispatcher.BeginInvoke(Moo);
}

private async void Moo()
{
    await new WebClient().DownloadStringTaskAsync("http://google.de");
}

Strange enough, it only occurs when there was no emulator instance before and it had to go through the boot process. As long as I press VS' "restart debug" button, I repeatedly get the same error, but if I stop debugging and then start again without closing the emulator, it works just fine.

The Exception itself is pretty much meaningless: The response stream is empty and it terminated with NotFound, while the Status was UnknownError. Stack trace (of the inner web exception):

at System.Net.Browser.ClientHttpWebRequest.InternalEndGetResponse(IAsyncResult asyncResult)
at System.Net.Browser.ClientHttpWebRequest.<>c__DisplayClasse.<EndGetResponse>b__d(Object sendState)
at System.Net.Browser.AsyncHelper.<>c__DisplayClass1.<BeginOnUI>b__0(Object sendState)

Source was System.Windows. Let me know if you need any more info.

How can make it work for the first emulator runs? Where should I look for the error? Certainly not in connectivity of the windows phone I think.

Upvotes: 2

Views: 175

Answers (1)

Ignacio Soler Garcia
Ignacio Soler Garcia

Reputation: 21855

Try with a real device as this could be one of the several limitations the emulator has (for example the emulator is always connected to a 3G network and connected to a power charger).

Upvotes: 1

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