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I am attempting to convert this xaml binding to it's C# counterpart for various reasons:

<ListView x:Name="eventListView" Grid.Column="0" Grid.Row="1" Background="LightGray" BorderThickness="0">
    <local:EventCell x:Name="cell" Width="{Binding ActualWidth, Converter={StaticResource ListViewWidthConverter}, ElementName=eventListView, Mode=OneWay}"/>
</ListView>

I've read a lot of questions already that had similar problems and came up with this code:

Binding b = new Binding();
b.Source = eventListView;
b.Path = new PropertyPath(cell.Width);
b.Converter = new ListViewWidthConverter();
b.Mode = BindingMode.OneWay;
cell.SetBinding(ListView.ActualWidthProperty, b);

But the C# code won't compile, I am pretty lost as to why.

Cœur
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xvpower
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2 Answers2

22

In the constructor of the PropertyPath the cell.Width gets the value, you either want EventCell.ActualWidthProperty to get the DP-field if it is a DP, or use the string, "ActualWidth".

When translating XAML like this, just set the path in the Binding constructor which is the same constructor used in XAML (as the path is not qualified):

Binding b = new Binding("ActualWidth");

(If your binding were to be translated back to XAML it would be something like {Binding Path=123.4, ...}, note that the Path property is qualified as you did not use the constructor to set it)

Edit: Also the binding needs to be set on the EventCell.WidthProperty of course, you cannot set the ActualWidth, it seems your logic was inverted...

H.B.
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  • Still gives me a XamlParseException was unhandled. with b.Path = new PropertyPath(EventCell.WidthProperty); or b.Path = new PropertyPath("ActualWidth"); – xvpower Aug 08 '11 at 20:55
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    @xvpower: See my edit (and `PropertyPath(EventCell.WidthProperty)` is wrong, that should be `PropertyPath(EventCell.ActualWidthProperty)`) – H.B. Aug 08 '11 at 20:58
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I believe that you need to make the ActualWidthProperty throw a NotifyPropertyChanged event. Otherwise, the binding will not know to update when the property changes. Whenever I've done bindings, I've always had to implement INotifyPropertyChanged.

You might try extending the list view class and then implementing it on the width property. I gave a similar answer here: WPF Toolkit DataGrid column resize event

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Chad La Guardia
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