『 WPF』TextBox 숫자만 입력 받기

<XAML>

<TextBox x:Name="txtBox"
 PreviewTextInput="txtPrintCnt_PreviewTextInput">

<CS>

private void txtPrintCnt_PreviewTextInput(object sender, TextCompositionEventArgs e)
{
     e.Handled = new Regex("[^0-9]+").IsMatch(e.Text);
}

참 쉽죠잉~~