创建仅接受Text的WPF TextBox

Question

private void txtLastName_PreviewKeyDown(object sender, KeyEventArgs e)
    {
        if (!char.IsDigit((char)e.Key)) e.Handled = true;
    }

但它不支持键盘上的所有键。

Answer 1

您必须使用IsLetter。

private void txtLastName_PreviewKeyDown(object sender, KeyEventArgs e)
    {
        if (Char.IsLetter((char)e.Key)) e.Handled = true;
    }

Answer 2

    private void txtLastName_PreviewTextInput(object sender, TextCompositionEventArgs e)
    {
        if (!System.Text.RegularExpressions.Regex.IsMatch(e.Text, "^[a-zA-Z]"))
        {
            e.Handled = true;
        }
    }