在WPF中数据绑定WebBrowser的Source属性

Question

有谁知道如何在WPF(3.5SP1)中数据绑定WebBrowser的.Source属性？我有一个listview,我希望在左边有一个小的WebBrowser,在右边有内容,并在每个WebBrowser的源中为每个绑定到列表项的对象中的URI进行数据绑定.

这是我迄今为止的概念证明,但" <WebBrowser Source="{Binding Path=WebAddress}""不编译.

<DataTemplate x:Key="dealerLocatorLayout" DataType="DealerLocatorAddress">                
    <StackPanel Orientation="Horizontal">
         <!--Web Control Here-->
        <WebBrowser Source="{Binding Path=WebAddress}"
            ScrollViewer.HorizontalScrollBarVisibility="Disabled" 
            ScrollViewer.VerticalScrollBarVisibility="Disabled" 
            Width="300"
            Height="200"
            />
        <StackPanel Orientation="Vertical">
            <StackPanel Orientation="Horizontal">
                <Label Content="{Binding Path=CompanyName}" FontWeight="Bold" Foreground="Blue" />
                <TextBox Text="{Binding Path=DisplayName}" FontWeight="Bold" />
            </StackPanel>
            <TextBox Text="{Binding Path=Street[0]}" />
            <TextBox Text="{Binding Path=Street[1]}" />
            <TextBox Text="{Binding Path=PhoneNumber}"/>
            <TextBox Text="{Binding Path=FaxNumber}"/>
            <TextBox Text="{Binding Path=Email}"/>
            <TextBox Text="{Binding Path=WebAddress}"/>
        </StackPanel>
    </StackPanel>
</DataTemplate>

Answer 1

问题是WebBrowser.Source不是DependencyProperty.一种解决方法是使用一些AttachedProperty魔法来启用此功能.

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 = !String.IsNullOrEmpty(uri) ? new Uri(uri) : null;
        }
    }

}

然后在你的xaml做:

<WebBrowser ns:WebBrowserUtility.BindableSource="{Binding WebAddress}"/>

Answer 2

我已经修改了Todd的优秀答案,以生成一个版本来处理绑定源中的字符串或Uris:

public static class WebBrowserBehaviors
{
    public static readonly DependencyProperty BindableSourceProperty =
        DependencyProperty.RegisterAttached("BindableSource", typeof(object), typeof(WebBrowserBehaviors), new UIPropertyMetadata(null, BindableSourcePropertyChanged));

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

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

    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;
    }

Answer 3

我写了一个包装器usercontrol,它使用了DependencyProperties:

XAML:

<UserControl x:Class="HtmlBox">
    <WebBrowser x:Name="browser" />
</UserControl>

C#:

public static readonly DependencyProperty HtmlTextProperty = DependencyProperty.Register("HtmlText", typeof(string), typeof(HtmlBox));

public string HtmlText {
    get { return (string)GetValue(HtmlTextProperty); }
    set { SetValue(HtmlTextProperty, value); }
}

protected override void OnPropertyChanged(DependencyPropertyChangedEventArgs e) {
    base.OnPropertyChanged(e);
    if (e.Property == HtmlTextProperty) {
        DoBrowse();
    }
}
 private void DoBrowse() {
    if (!string.IsNullOrEmpty(HtmlText)) {
        browser.NavigateToString(HtmlText);
    }
}

并像这样使用它:

<Controls:HtmlBox HtmlText="{Binding MyHtml}"  />

这个问题的唯一问题是WebBrowser控件不是"纯粹的"wpf ......它实际上只是win32组件的包装器.这意味着控件将不会尊重z-index,并且将始终覆盖其他元素(例如:在滚动查看器中这可能会导致一些问题)有关MSDN上这些win32-wpf问题的更多信息