MethodBinding

Edit

The MethodBinding plugin is part of the Rio binding extensions for MvvmCross.

The MethodBinding plugin is a pure .NET Standard plugin - it contains only .NET Standard assemblies.

When MethodBinding is loaded, then MvvmCross data-binding:

• can use public methods as well as ICommand properties for action/command binding.

Setup

Since this plugin is typically not explicitly referenced in a MvvmCross project, it is necessary to reference it to ensure that MvvmCross loads it at startup.

Placing a reference in your LinkerPleaseInclude.cs file is a good place to do this.

public void Include(MvvmCross.Plugin.MethodBinding.Plugin p)
{
    var _ = p;
}

Alternatively you can ensure that plugin is loaded in your MvxApplication class.

public override void LoadPlugins(IMvxPluginManager pluginManager)
{
    pluginManager.EnsurePluginLoaded<MvvmCross.Plugin.MethodBinding.Plugin>();
}

Example

An example of a Rio-based ViewModel using MethodBinding:

public class FirstViewModel
    : MvxViewModel
{
    public FirstViewModel()
    {
        
    }

    public void Save()
    {
        ... your code here
    }
}

The Save method in this class could be accessed using Android syntax:

    <Button
        android:layout_width='fill_parent'
        android:layout_height='wrap_content'
        android:text='Save'
        local:MvxBind='Click Save' />

And as follows for FluentBinding in iOS or Android.

var set = CreateBindingSet();
set.Bind(_button).To(nameof(ViewModel.Save));
set.Apply();

Note the use of nameof. You cannot use vm => vm.Save for fluent method binding. Using nameof will ensure that the compiler will catch errors if you rename the method at a later date.

References

For more on Rio MethodBinding see N=36 on http://slodge.blogspot.co.uk/2013/07/n36-rio-binding-carnival.html