如何取消绑定DocumentComplete处理程序？

Question

I have following code:

webBrowser1.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(Action1);
webBrowser1.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(Action2);

Works just fine.

But they seem to trigger every time any page is done downloading. Though I want them to trigger only once for every page. Say Action1 for Page1, Action2 for Page2 etc.

I tried to add an empty handler like this:

void StopDoingStuff(object sender, WebBrowserDocumentCompletedEventArgs e)
{
    Application.DoEvents();
}

But it seems that C# triggers this as a third handler for DocumentComplete event, so it does not actually stop other two.

Do you know how to fix it?

Answer 1

To unsubscribe from an event, use the following syntax:

webBrowser1.DocumentCompleted -= Action2

Here's an msdn explanation: http://msdn.microsoft.com/en-us/library/ms366768(v=VS.100).aspx