WPF按钮IsEnabled不起作用

Question

i have a method that enabling and disabling button in here.My if-else block should do when enter a number to lbDivide the 'öde', '0' and '00' buttons should be active but only activing öde button.How do i solve this ?

öde = make payment

Kişi Sayısı = How many person?

private void Bol_Click(object sender, RoutedEventArgs e)
    {
        lbDivide.Text = "0";
        btnBol.Opacity = 0.5;
        btnBol.IsEnabled = false;
        lbPayment.Visibility = Visibility.Hidden;

        if (lbDivide.Text == "0")
        {
            btnQr.Opacity = 0.5;
            btnQr.IsEnabled = false;
            zero.Opacity = 0.2;
            zero.IsEnabled = false;
            double_zero.IsEnabled = false;
            double_zero.Opacity = 0.2;
        }
        else
        {
            btnQr.Opacity = 1;
            btnQr.IsEnabled = true;
            zero.Opacity = 1;
            double_zero.Opacity = 1;
            zero.IsEnabled = true;
            double_zero.IsEnabled = true;
        }

Answer 1

I think I know where the error is.

private void Bol_Click(object sender, RoutedEventArgs e)
{
    lbDivide.Text = "0";   /// in this line of code you're basically setting lbDivide.text to be 0 every time the button is clicked, so the else condition will never be met.
    btnBol.Opacity = 0.5;
    btnBol.IsEnabled = false;   /// you're basically disabling the button after the first click.
    lbPayment.Visibility = Visibility.Hidden;

    if (lbDivide.Text == "0")
    {
        btnQr.Opacity = 0.5;
        btnQr.IsEnabled = false;
        zero.Opacity = 0.2;
        zero.IsEnabled = false;
        double_zero.IsEnabled = false;
        double_zero.Opacity = 0.2;
    }
    else
    {
        btnQr.Opacity = 1;
        btnQr.IsEnabled = true;
        zero.Opacity = 1;
        double_zero.Opacity = 1;
        zero.IsEnabled = true;
        double_zero.IsEnabled = true;
    }
}

Answer 2

将if（lbDivide.Text ==“ 0”）更改为if（lbDivide.Text.Equals（“ 0”））