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Fritz
Let's suppose we have a client application, pushing a button we call
a webmethod asynchronously and inside the callback function we
manage the operation result. Something like this for instance:

private void button_Click(object sender, System.EventArgs e)
{
Service1 s=new Service1();
AsyncCallback cb = new AsyncCallback(this.HelloCallback);
IAsyncResult ar = s.BeginHello(textBox1.Text, cb, s);
}

private void HelloCallback(IAsyncResult ar)
{
Service1 s=(Service1)ar.AsyncState;
string result = s.EndHello(ar);
MessageBox.Show(result);
}

Let's suppose that the webmethod execution lasts for a long time, sufficient
to get an http connection timeout. At this time a WebException is raised.
The exception is not triggered by the execution of any of the previous
instructions but, as far as I can imagine, it is fired somewhere in a
parallel
thread which manages the asynchronous call.
The question is, how can I handle this kind of exceptions?

Thanks in advance.

--
Fritz
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Vitaly Filimonov [MSFT] (VIP)
You can put try/catch block inside your callback function. Once you call
End...() you'll get SoapException generated for you.

--
Vitaly.
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System.AsyncCallback
System.EventArgs
System.IAsyncResult
System.Net.WebException
System.Web.Services.Protocols.SoapException
System.Windows.Forms.MessageBox
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