Keboo / Xamarin.Forms.Proxy

A proxy PCL class with access to Xamarin.Forms internal members to allow for easier extension of the library.

Xamarin.Forms.Proxy

A proxy PCL with access to Xamarin.Forms internal members to allow for easier extension of the library. It does this by exploiting the InternalsVisibleTo attribute and sets its assembly name to "Xamarin.Forms.Core.UnitTests".

##MultiBinding This class adds a MultiBinding (similar to WPF's MultiBinding class). It currently only supports one way bindings using either a string format or a value converter.

Usage:

<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:xfProxy="clr-namespace:Xamarin.Forms.Proxy;assembly=Xamarin.Forms.Core.UnitTests">
  <Label>
    <Label.Text>
      <xfProxy:MultiBinding StringFormat="Good evening {0}. You are needed in the {1}">
        <Binding Path="User" />
        <Binding Path="Location" />
      </xfProxy:MultiBinding>
    </Label.Text>
  </Label>
</ContentPage>

For anyone wanting a simple MultiBinding implementation using IMarkupExtension that can be used without creating a special PCL you can find one here. Please note that the IMarkupExtention implementation will not work when used within a setter. Use the MultiBinding class here if you need support for setters.

For additional details see blog posted here.