mouse leave control in WPF C#

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Dear sir,

I am using two textbox, When I leave the first textbox using with the mouse (by clilcking on another textbox on the form) it is come out.

my quoestion: if the textbox is empty the cursor not come out. please help me
Thanks

Posted 6-Sep-11 21:22pm

gpasupathi

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Wayne Gaylard · Answer 1 · 2011-09-06T22:26:00

I assume you mean to ask how to set the focus back to textBox1 if the text is empty. To do this you need to handle the PreviewLostKeyboardFocus event. There you check if textbox is empty and if so set e.handled to true like this:-

XML

<TextBox Name="textBox1" PreviewLostKeyboardFocus="textBox1_PreviewLostKeyboardFocus" />

C#

private void textBox1_PreviewLostKeyboardFocus(object sender, KeyboardFocusChangedEventArgs e)
        {
            if (textBox1.Text == string.Empty)
            {
                e.Handled = true;
            }
        }

Hope this helps