x:Bind to events support

[MartinZikmund]

Current behavior

When x:Bind binds to parameterless method in page's code-behind, invalid code is generated.

Expected behavior

Generated code should be valid.

How to reproduce it (as minimally and precisely as possible)

XAML:

<Button Click="{x:Bind OnClick}" />

Code-behind:

private void OnClick()        
{
    System.Diagnostics.Debug.WriteLine("Clicked!");
}

Observe this compiles and works properly on UWP.
In Uno, it generates invalid code:

c0.SetBinding("Click", new Windows.UI.Xaml.Data.Binding{ Mode = BindingMode.OneTime }.Apply(___b =>  /*defaultBindModeOneTime*/ global::Uno.UI.Xaml.BindingHelper.SetBindingXBindProvider(___b, this, ___ctx => OnClick, null )));

Cannot convert method group 'OnClick' to non-delegate type 'object'. Did you intend to invoke the method?

Environment

Nuget Package: latest

Package Version(s): dev

Affected platform(s):

• iOS
• Android
• WebAssembly
• WebAssembly renderers for Xamarin.Forms
• macOS
• Windows
• Build tasks
• Solution Templates

Visual Studio:

• 2017 (version: )
• 2019 (version: )
• for Mac (version: )

Relevant plugins:

• Resharper (version: )

Anything else we need to know?

[jeromelaban]

Thanks Martin! This is called x:Bind to events. I've got a branch with a PoC to implement that.

[MartinZikmund]

@jeromelaban oh sorry, here I thought I have used it in Uno before 😄 .