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POWhich event can I use to trigger an update to a label before the click event is triggered by hitting enter on the keyboard?
 

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  1. POWhich event can I use to trigger an update to a label before the click event is triggered by hitting enter on the keyboard?
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    <p>I have an application that does some pretty complicated calculations when a button is clicked. I'm still trying to get this code more efficient but in the meantime I want to give the user feedback to show that the button has been clicked and the calculations are in progress by updating a label on the UI. </p> <p>The UI is not updated until the click event has been completed so I have to put the code into an event that is called just before the click event's code is triggered.</p> <p>So far I'm using the <code>PreviewMouseLeftButtonDown</code> event which is called before the click event is executed to update the label. This works for a mouse click.<br> BUT if the user hits Enter while the button is in focus it appears as though the <code>PreviewKeyDown</code> AND <code>KeyDown</code> events are never triggered, or at least not triggered before the Click event is triggered.</p> <p>What event can I use to update the label when the enter key is hit OR do you know of another way I can get the label to update before the Click Event's Code is run?</p> <p>Update: I've noticed that the <code>PreviewKeyDown</code> event is triggered before the <code>click</code> event, but I don't see the label updating before the <code>click</code> event code is run. I don't see anything wrong with my code.</p> <pre><code> private void Button1_KeyDown(object sender, KeyEventArgs e) { try { if (e.Key == Key.Return || e.Key == Key.Enter) { lblMessage.Content = "Loading..."; } } catch (Exception) { } } </code></pre>
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    1. CObind a string variable with label. Make the binding with label 2 way. Update the text when user clicks on the button. It might refersh the label as the binding is two way.
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      1. POWhich event can I use to trigger an update to a label before the click event is triggered by hitting enter on the keyboard?
      1. USPriyank Thakkar
    2. COThank you for the comment. I'm going to give that a try. I'll report back if it works.
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    3. COMake sure to mark the answer if any posted answer helped you.
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      1. USalan
 

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