It is necessary to track the link change in WebView 2. I have the following code in the VM:

VM

private Uri _myHtml;

public Uri MyHtml
{
    get { return _myHtml; }
    set
    {
        _myHtml = value;
        CheckUri(MyHtml);
        OnPropertyChanged();
        OnPropertyChanged(nameof(MyHtml));
    }
}

VMBASE

public event PropertyChangedEventHandler PropertyChanged;

protected void OnPropertyChanged([CallerMemberName] string propertyName = "")
{
    PropertyChangedEventHandler handler = this.PropertyChanged;
    if (handler != null)
    {
        var e = new PropertyChangedEventArgs(propertyName);
        handler(this, e);
    }
}

VIEW XAML

<Wpf:WebView2 Name="webView"
                  Source="{Binding MyHtml, UpdateSourceTrigger=Explicit}" Grid.RowSpan="2"  Grid.ColumnSpan="3" HorizontalAlignment="Stretch" VerticalAlignment="Stretch"  />

Alas, the breakpoint on "set" is triggered only when the "MyHTML" variable is directly assigned a value. But when you change the URL in WebView2, nothing changes

CodePudding user response：

You have two options

1. Set the Mode to TwoWay, and remove the UpdateSourceTrigger=Explicit

Source="{Binding MyHtml, Mode=TwoWay}"

2. If you want to keep Explicit mode, you have to call UpdateSource() to update the bound property (i.e.MyHtml). This can be done by handling NavigationCompleted event like so..

In .xaml

<Wpf:WebView2 
    Source="{Binding MyHtml, UpdateSourceTrigger=Explicit, Mode=TwoWay}"
    NavigationCompleted="WebView_OnNavigationCompleted" ..

In .xaml.cs

private void WebView_OnNavigationCompleted(object sender, CoreWebView2NavigationCompletedEventArgs args)
{
    if (args.IsSuccess)
    {
        var bindingExpression =  
            webView.GetBindingExpression(WebView2.SourceProperty);
        bindingExpression?.UpdateSource();
    }
}

Note that in both options you need Mode=TwoWay.