Question

I have a ListBox that has a style defined for ListBoxItems. Inside this style, I have some labels and a button. One that button, I want to define a click event that can be handled on my page (or any page that uses that style). How do I create an event handler on my WPF page to handle the event from my ListBoxItems style?

Here is my style (affected code only):

<Style x:Key='UsersTimeOffList'  TargetType='{x:Type ListBoxItem}'> ...  <Grid> <Button x:Name='btnRemove' Content='Remove' Margin='0,10,40,0' Click='btnRemove_Click' /> </Grid> </Style> 

Thanks!

Answer 1

Take a look at RoutedCommands.

Define your command in myclass somewhere as follows:

    public static readonly RoutedCommand Login = new RoutedCommand(); 

Now define your button with this command:

    <Button Command='{x:Static myclass.Login}'  />   

You can use CommandParameter for extra information..

Now last but not least, start listening to your command:

In the constructor of the class you wish to do some nice stuff, you place:

    CommandBindings.Add(new CommandBinding(myclass.Login, ExecuteLogin)); 

or in XAML:

   <UserControl.CommandBindings>         <CommandBinding Command='{x:Static myclass.Login}' Executed='ExecuteLogin' />    </UserControl.CommandBindings> 

And you implement the delegate the CommandBinding needs:

    private void ExecuteLogin(object sender, ExecutedRoutedEventArgs e)     {           //Your code goes here... e has your parameter!     } 

You can start listening to this command everywhere in your visual tree!

Hope this helps

PS You can also define the CommandBinding with a CanExecute delegate which will even disable your command if the CanExecute says so 🙂

PPS Here is another example: RoutedCommands in WPF