c# - WPF单选按钮等效

Question

WinForms 单选按钮 CheckedChanged 的​​ WPF 等价物是什么？

I have your basic 2 radio button set up, where when one is selected a textbox is enabled and when the other is selected it is disabled.

暂时我使用的是 RadioButton_Checked，除了我在 xaml 中为一个按钮设置 IsChecked true。当我在该 Checked 方法中引用文本框时，它会抛出 NullReferenceException...

编辑:

XAML:

<RadioButton Name="rb1" IsChecked="True" GroupName="1" Checked="rb1_Checked"></RadioButton>

<RadioButton Name="rb2" GroupName="1" Checked="rb2_Checked"></RadioButton>

C#:

    private void rb2_Checked(object sender, RoutedEventArgs e)
    {
        txt.IsEnabled = false;
    }

    private void rb1_Checked(object sender, RoutedEventArgs e)
    {
        txt.IsEnabled = true; //null reference here on load
    }

Answer 1

您不能将文本框的 enabled 属性绑定(bind)到 xaml 中相应单选按钮的 checked 属性吗？

<Textbox IsEnabled="{Binding ElementName=rb2, Path=IsChecked}" />