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Paste Event in a WPF TextBox

Asked 2010-06-17T12:08:36.033
77

I have created a custom control inheriting TextBox. This custom control is a numeric TextBox, only supporting numbers.

I am using OnPreviewTextInput to check each new character being typed to see if the character is a valid input. This works great. However, if I paste the text into the TextBox, OnPreviewTextInput is not fired.

What is the best way to capture pasted text in a TextBox?

Also, I have a problem when the back space is pressed, I can't figure out what event this will fire. OnPreviewTextInput is not fired!

Any ideas how to capture pasted text and back space events in WPF TextBox?

c# wpf events textbox
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1 Answer

11

For backspace, please check the PreviewKeyDown event

For paste command, add a command binding to the ApplicationCommands.Paste, and set the argument to handled, if you do not wish to do anything with it:

<Window.CommandBindings>
  <CommandBinding Command="ApplicationCommands.Paste"
                  Executed="PasteExecuted" />
</Window.CommandBindings>

And in code behind:

private void PasteExecuted(object sender, ExecutedRoutedEventArgs e)
{
    e.Handled = true;
}
answered 2010-06-17T12:13:03.757

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