WPF event trigger for clear TextBox

Question

So i have the TextBox :

<TextBox Controls:TextBoxHelper.ClearTextButton="True"
         LostFocus="textboxNewValueCell_LostFocus"
         TextChanged="textboxNewValueCell_TextChanged"/>

And when press on Clear button i want to catch the event .

Is it possible ?

I did not find any event

Answer 1

The ClearTextButton simply calls Clear() on the TextBox . There is no specific event raised. The best you can do is to handle the TextChanged event:

private void textboxNewValueCell_TextChanged(object sender, TextChangedEventArgs e)
{
    TextBox tb = sender as TextBox;
    if (tb.Text.Length == 0)
    {
        //the TextBox was cleared and the Button was maybe clicked...
    }
}

Answer 2

First, give your TextBox a name. Then, create a click event on the Button. when the click event fires, handle the clearing of the TextBox in the CodeBehind.

<Grid>
    <TextBox x:Name="MyTextBox" Text="Some Text"/>
    <Button x:Name="ClearButton" Click="ClearButton_Click"/>
</Grid>


 private void ClearButton_Click(object sender, RoutedEventArgs e)
 {
     MyTextBox.Text = string.Empty;
 }