Hello,

I have been looking into your question and according to the given sample DataContextProxyClass in not intend to be set in the code behind, because the example tries to demonstrate a different technique. Nevertheless if you would like to get this instance you can use LayoutRoot.FindResource["proxy"] method.

What is happening is that you have declared the DataContextProxy class that exposes the ProxiedObject property:

public class DataContextProxy : DependencyObject

{

    public object ProxiedObject

    {

        get { return (object)GetValue(ProxiedObjectProperty); }

        set { SetValue(ProxiedObjectProperty, value); }

    }

    public static readonly DependencyProperty ProxiedObjectProperty =

        DependencyProperty.Register("ProxiedObject", typeof(object),

                                     typeof(DataContextProxy), null);

}

In the xaml we are trying to bind a non-visual element to some property in the code behind and because it is not possible, we are going to use the ProxiedObject dependency property . Lets say that you have ViewModel class that exposes a property called MyCustomHeader. If you set :

<Grid x:Name="LayoutRoot" DataContext="{StaticResource vm}">

And then bind the ProxiedObject property to the grid’s DataContext:

<Grid x:Name="LayoutRoot" … >

    <Grid.Resources>

        <local:DataContextProxy

            ProxiedObject="{Binding Path=DataContext,ElementName=LayoutRoot}"

            x:Key="proxy" />

    </Grid.Resources>

the ProxiedObject property will actually hold reference of our VeiwModel class. All we have to do then is to bind the needed xamGrid’s property to the corresponding property of that instance:

            <ig:TextColumn Key="CustomerName"

                 HeaderText="{Binding Source={StaticResource proxy},

                 Path=MyCustomHeader }" />

I hope that the approach seems more clear now.

Please in case of other questions regarding the discussed matter, do not hesitate to ask again.

Hello,

Would you please send me an isolated  sample in order for me to take a look.

Thank you in advance.

Hello,

Thank you for your project.

The “cannot resolve symbol IsReadOnly” means that the compiler do not know what is IsReadOnly. That means that either you have a typo in the property name or in the given class there is on such property. For now I assume that the reason for the binding not to succeed is the Grid’s DataContext. Have you tried passing the ViewModel class itself instead of going through the Locator – if dataContext binding of the Grid do not succeed and the ViewModel instance is not being passed correctly by the Locator, you are going to look for the IsReadOnly in the Locator itself and therefore such an error can be produced.

I will be looking forward to hearing from you.

Hello Vamshi,

I can say that this behavior is expected and you have to clear the cache. You can do it by code, too. Here is discussed how to do so:

Hello,

I have been looking into your issue and I have created a sample project that demonstrates the complete implementation of this approach. Notice that the Proxy class is working as expected and the property is being applied successfully.

Please let me know if you have future concerns regarding the discussed matter.