Pass index of a List to button click event sender

I have a List and each Button calls to the same Click function

List<Button> btnList = new List<Button>;

// function to add a new button
Button btn = new Button();
btn.Click += showIndex_Click;
btnList.Add(btn);

private void showIndex_Click(object sender, Rou开发者_Go百科tedEventArgs e)
{
     MessageBox.Show(???);  
}

The click event will display the index of the sender Button. How can I do that?

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The sender parameter is the Button who fired the event. You can use it to search in the list and find its index.

var button = sender as Button;
var index = btnList.IndexOf(button);

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here clickbtn will store all the informattion about the button that is clicked.

So you can get the index about that button

private void showIndex_Click(object sender, RoutedEventArgs e)
{
     Button clickbtn = sender as Button;

     MessageBox.Show(???);  
}