Question

I want to have 2 selectionchanged events,
like this

protected override void xpathList_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
//my code
}

private void xpathList_SelectionChanged(object sender, SelectionChangedEventsArgs e)
{
//my code
}

it gives the following error: Type 'TestApp.MainPage' already defines a member called 'xpathList_SelectionChanged' with the same parameter type.
How can I solve this?

Answer 1

You can’t create to identical method with same signature.
If you want to handle one event for one control by two different methods, you must use such code:

Page_Init()
{
    //initialization code
    xpathList.OnSelectionChanged += xpathList_SelectionChanged1;
    xpathList.OnSelectionChanged += xpathList_SelectionChanged2;
}

protected void xpathList_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
//my code
}

protected void xpathList_SelectionChanged2(object sender, SelectionChangedEventsArgs e)
{
//my code
}

and remove event handler declaration from markup.

How to: Create Event Handlers in ASP.NET Web Pages