I would like to pass a Xamarin.Forms.Button
in it's own Command
as the CommandParameter
to my ViewModel. I know how to achieve this from the code behind e.g. ...
XAML (with most properties missed out for brevity)
<Button x:Name="myButton"
Text="My Button"
Command="{Binding ButtonClickCommand}"/>
XAML.cs
public partial class MyTestPage
{
public MyTestPage()
{
InitializeComponent();
myButton.CommandParameter = myButton;
}
}
ViewModel
public class MyViewModel : ViewModelBase
{
public MyViewModel()
{
ButtonClickCommand = new Command(
(parameter) =>
{
var view = parameter as Xamarin.Forms.Button;
if (view != null)
{
// Do Stuff
}
});
}
public ICommand ButtonClickCommand { get; private set; }
}
... BUT is it possible to declare the CommandParameter
in the XAML itself? Or in other words what is the binding syntax to set the parameter to the button itself?
<Button x:Name="myButton"
Text="My Button"
Command="{Binding ButtonClickCommand}"
CommandParameter="{[WHAT WOULD GO HERE]}"/>
btw I've already tried CommandParameter="{Binding RelativeSource={RelativeSource Self}}"
and that didn't work.
Thanks,
Xamarin.Forms
has a Reference markup extension that does just that:
<Button x:Name="myButton"
Text="My Button"
Command="{Binding ButtonClickCommand}"
CommandParameter="{x:Reference myButton}"/>
Although, this is the first time I'm seeing this need, and you probably can better separate your Views from your ViewModels and solve this by using a cleaner pattern, or by not sharing a command across buttons.