DependencyProperty BindableSource cannot be set on an object of type Microsoft.Phone.Controls.WebBrowser WP8

Question

I'm trying to add a DependencyProperty to my WebBrowser control in my WP8 app so that I can bind the source to a property within my ViewModel.

I found this thread on StackOverflow databind the Source property of the WebBrowser in WPF

Since this applied to WPF, I've had to make a few changes to behaviour code (nothing major):

public class WebBrowserBehaviors : Behavior<WebBrowser>
{
    protected override void OnAttached()
    {
        base.OnAttached();         
    }

    protected override void OnDetaching()
    {
        base.OnDetaching();
    }

    public static readonly DependencyProperty BindableSourceProperty= DependencyProperty.Register(
    "BindableSource",
    typeof(bool),
    typeof(WebBrowserBehaviors),
    new PropertyMetadata(BindableSourcePropertyChanged)
    );

    public static void SetBindableSource(DependencyObject obj, string value)
    {
        obj.SetValue(BindableSourceProperty, value);
    }

    public static string GetBindableSource(DependencyObject obj)
    {
        return (string)obj.GetValue(BindableSourceProperty);
    }

    public static void BindableSourcePropertyChanged(DependencyObject o, DependencyPropertyChangedEventArgs e)
    {
        WebBrowser browser = o as WebBrowser;
        if (browser == null) return;

        Uri uri = null;

        if (e.NewValue is string)
        {
            var uriString = e.NewValue as string;
            uri = string.IsNullOrWhiteSpace(uriString) ? null : new Uri(uriString);
        }
        else if (e.NewValue is Uri)
        {
            uri = e.NewValue as Uri;
        }

        browser.Source = uri;
    }
}

The thread also provide a XAML sample:

<WebBrowser ns:WebBrowserUtility.BindableSource="{Binding WebAddress}"
ScrollViewer.HorizontalScrollBarVisibility="Disabled" 
ScrollViewer.VerticalScrollBarVisibility="Disabled" 
Width="300"
Height="200" />

But I'm having 2 problems:

Problem 1:

I declared my namespace as follows:

xmlns:behaviors="clr-namespace:MyApp.Behaviors"

My WebBrowser control is defined as follows and I've removed my Source={Binding CurrentUri} and replaced it by behaviors:WebBrowserBehaviors.BindableSource.
```
`<Grid Grid.Row="0" >
    <phone:WebBrowser x:Name="webBrowser"
        behaviors:WebBrowserBehaviors.BindableSource="{Binding ...}"
        IsScriptEnabled="True" 
        NavigationFailed="webBrowser_NavigationFailed" 
        Navigating="webBrowser_Navigating" 
        LoadCompleted="webBrowser_LoadCompleted" 
        Navigated="webBrowser_Navigated" 
        IsEnabled="{Binding IsLoading.IsFalse}">
    </phone:WebBrowser>
</Grid>`
```
And while intellisense detects behaviours, WebBrowserBehaviors, and BindableSource it displays the following error message:

Error 1 DependencyProperty MyApp.Behaviors.WebBrowserBehaviors. BindableSource cannot be set on an object of type Microsoft.Phone.Controls.WebBrowser.
Problem 2:

Originally I had <WebBrowser Source={Binding CurrentUri}>

but when I try to use behaviors:WebBrowserBehaviors.BindableSource="{Binding ...}"

intellisense doesn't show me any of my ViewModels property which are binded to my layoutRoot.

I don't know if it's related to problem 1, but I thought I'd better mention it.

Can anyone help?

Thanks.

Your base type is incorrect. It should be changed from "typeof(bool)" to "typeof(string)". — Chubosaurus Software, Aug 23 '14 at 03:01
Hi, I just figured it out :). There is actually another problem with the definition. — Thierry, Aug 23 '14 at 03:16
Great. I was just leading you towards a solution. I noticed a lot of stuff I would've done differently. :D, good luck. — Chubosaurus Software, Aug 23 '14 at 03:25
Thanks. My solution worked great, but I'd be interested in what else you would have change. Always interested in learning more and better code :) — Thierry, Aug 23 '14 at 04:55

score 0 · Answer 1 · answered Aug 23 '14 at 03:29

There is 2 issues with my DependencyProperty definition.

The propertyType parameter is invalid. Its base type is set to typeof(bool) when it should be typeof(string)
The ownerType parameter is invalid. Its base type set to typeof(WebBrowserBehaviors) when it should be typeof(WebBrowser)

So the DependencyProperty will look like this:

public static readonly DependencyProperty BindableSourceProperty= DependencyProperty.Register(
    "BindableSource",
    typeof(string),
    typeof(WebBrowser),
    new PropertyMetadata(BindableSourcePropertyChanged)
    );

Point 2 is actually the one creating the error described in my title but point 1 would have thrown an error or validation would have failed when trying to set the property to a string.

DependencyProperty BindableSource cannot be set on an object of type Microsoft.Phone.Controls.WebBrowser WP8

1 Answers1