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public static void TxtLeif_PreviewTextInput(object sender, TextCompositionEventArgs e)
{
TextBox txt = sender as TextBox;
Regex re = new Regex("[^0-9.]+");
if (txt.Text.Contains(".") && e.Text == ".")
{
e.Handled = true;
return;
}
e.Handled = re.IsMatch(e.Text);
}
{
TextBox txt = sender as TextBox;
Regex re = new Regex("[^0-9.]+");
if (txt.Text.Contains(".") && e.Text == ".")
{
e.Handled = true;
return;
}
e.Handled = re.IsMatch(e.Text);
}
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