How you can allow TextBox to accept only number on your WPF
You just need to write the code in “PreviewTextInput” event of TextBox just follow the steps what i am going to do. Code is below.
xaml code:
<TextBox Width="100"
VerticalAlignment="Center"
HorizontalAlignment="Center"
PreviewTextInput="TextBox_PreviewTextInput"/>
cs code：
private void TextBox_PreviewTextInput(object sender, System.Windows.Input.TextCompositionEventArgs e)
{
e.Handled = new System.Text.RegularExpressions.Regex("[^0-9]+").IsMatch(e.Text);
}
