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POUsing a custom attached property with a binding
 

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    <p>I was looking at <a href="https://stackoverflow.com/questions/263551/databind-the-source-property-of-the-webbrowser-in-wpf">this question</a>, but I don't understand how to actually USE the created AttachedProperty. The problem is trying to have a binding on the source of the WebBrowser control.</p> <p>The code there looks like:</p> <pre><code>public static class WebBrowserUtility { public static readonly DependencyProperty BindableSourceProperty = DependencyProperty.RegisterAttached("BindableSource", typeof(string), typeof(WebBrowserUtility), new UIPropertyMetadata(null, BindableSourcePropertyChanged)); public static string GetBindableSource(DependencyObject obj) { return (string) obj.GetValue(BindableSourceProperty); } public static void SetBindableSource(DependencyObject obj, string value) { obj.SetValue(BindableSourceProperty, value); } public static void BindableSourcePropertyChanged(DependencyObject o, DependencyPropertyChangedEventArgs e) { WebBrowser browser = o as WebBrowser; if (browser != null) { string uri = e.NewValue as string; browser.Source = uri != null ? new Uri(uri) : null; } } } </code></pre> <p>and </p> <pre class="lang-xml prettyprint-override"><code>&lt;WebBrowser ns:WebBrowserUtility.BindableSource="{Binding WebAddress}" ScrollViewer.HorizontalScrollBarVisibility="Disabled" ScrollViewer.VerticalScrollBarVisibility="Disabled" Width="300" Height="200" /&gt; </code></pre> <p>The WebAddress, what is that exactly? This is my understanding (which is probably wrong):</p> <ul> <li>There's an AttachedProperty that can be attached to any object, and in this particular case, it is basically just attaching a property called BindableSource which is of type String.</li> <li><p>When we have the "{Binding WebAddress}" it means that in some c# code somewhere that handles this .xaml file there's something that looks like:</p> <pre><code>public String WebAddress { // get and set here? not sure } </code></pre></li> <li>And to take advantage of the property changed, I can called RaisedPropertyChanged and it will fire that static method up there?</li> </ul> <p>Even when I look at it, it doesn't seem right, but I can't find anything online to help me.</p>
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