EventArgsConverter

EventArgsConverter

The EventArgsConverter is a Xamarin.Forms IValueConverter which is intended to be used with the EventToCommandBehavior to retrieve a single property or field from the EventArgs class.

Parameters

You must supply the property/field to retrieve:

• PropertyName : the name of the public .NET property or field to retrieve the value from. If this is not supplied, an exception is thrown.

This converter expects that the value parameter will be the source of the event, and that the parameter will be the object to retrieve the property/field from. It will use runtime reflection to find the property or field - if neither can be located, an exception is thrown.

Example

In the following example, the TheCommand command would be located on the BindingContext of the associated ListView. This will pass the tapped Item as the parameter to the ICommand.

<Page xmlns:inf="clr-namespace:XamarinUniversity.Infrastructure;assembly=XamU.Infrastructure" 
      xmlns:cvt="clr-namespace:XamarinUniversity.Converters;assembly=XamU.Infrastructure" ...>
...
<ListView.Behaviors>
   <inf:EventToCommandBehavior EventName="ItemTapped" Command="{Binding TheCommand}">
      <inf:EventToCommandBehavior.EventArgsConverter>
         <cvt:EventArgsConverter PropertyName="Item" />
      </inf:EventToCommandBehavior.EventArgsConverter>
   </inf:EventToCommandBehavior>
</ListView.Behaviors>