Fail to do binding to image - silverlight

Question

i have simple class
public class A
{
public ImageSource imageSource
{
get;
set;
}
}
page class:
Public class page : Page
{
A a_class = new A();
}
And simple silverlight page that contain object type A.
In this page i have Image that i want to bind to imageSource of A.
So i wrote it and its not working.
<Image x:Name="Image_" Stretch="Fill"
Source="{Binding imageSource}" DataContext="{StaticResource a_class }"/>
How i need to write it so it will work fine ?
Thanks for any help.

Answer 1

The StaticResource markup extension doed not access fields or properties of the class that the Xaml is loaded into. Delete the line:-
A a_class = new A();
Instead instance A in a resource dictionary:-
<UserControl x:Class="YourApplication.UserControl1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:sdk="http://schemas.microsoft.com/winfx/2006/xaml/presentation/sdk"
xmlns:local="clr-namespace:YourApplication"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="400">
<UserControl.Resources>
<local:A x:Key="a_class" />
</UserControl>
<Grid x:Name="LayoutRoot">
<Image x:Name="Image_" Stretch="Fill"
Source="{Binding imageSource}" DataContext="{StaticResource a_class}"/>
</Grid>
</UserControl>
Note is you want the Image control to track changes made to the imageSource property you need A to implement INotifyPropertyChanged.