C＃WPF-如何将文本框的Enter键绑定到方法？

Question

I have a TextBox with an 'OK' button below it. The 'OK' button runs the method in my RunPanel static class like this: RunPanel.RunOK(); .

I would like pressing enter in the TextBox to also execute the method RunPanel.RunOK() .

How could I do this in XAML?

The answers I have come across seem confusing, so I was wondering if someone could help me out.

Answer 1

private void textBox_KeyUp(object sender, KeyEventArgs e)
    {
       if(e.Key == Key.Return)
        {
            MessageBox.Show("Enter key pressed, put your method in here!");
        }
    }

This does not help you execute the method you specified in XAML, however having the textbox subscribe to a KeyUp event, and then performing a check on which key was entered solves your issue. You can put RunPanel.RunOK() inside the if statement in this case, and it will fire IF the enter key was pressed inside the textbox.

Answer 2

KeyBinding would be probably your best shot.

For instance:

<Window>
   <Window.InputBindings>
    <KeyBinding Command="{Binding SomeCommand, RelativeSource={RelativeSource Self}}" Modifiers="Control" Key="F5"></KeyBinding>
   </Window.InputBindings>
 </Window>

Answer 3

How could I do this in XAML?

XAML is a markup language and you cannot really call methods in it. You could bind to a method using an ObjectDataProvider as described here: http://www.devcurry.com/2011/03/wpf-4-using-objectdataprovider-for.html

But if you want to do something when a button is clicked you should bind to a command of a view model and call your static method in the Execute method of this command.

Trying to everything or as much as possible in XAML just because you can and just for the sake of eliminating code is generally considered as an anti-pattern.

MVVM is not about eliminating code, it's mainly about separation of concerns and C# is a much more expressive and more concise language than XAML. So you should implement the behaviour of your application using a programming such as C# language and use XAML to define the visual presentation and the layout of your UI.