How to bind a polyline in template?

Question

I am trying to bind the points of a polyline in control template. The points should bind to a point collection in the codebehind. My current xaml code is as follows:

<Style TargetType="{x:Type c:LineDragThumb}">
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type c:LineDragThumb}">
                <Polyline Stroke="Transparent" Points="{Binding}"
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

Should I need to make a dependency property to hold the point collection?

Please guide..

Possible duplicate of [this question](http://stackoverflow.com/q/3960101/1136211). — Clemens, Aug 18 '12 at 11:20

score 0 · Accepted Answer · answered Aug 19 '12 at 08:37

No, you can have simple Notifiable property of PointCollection in your code-behind for binding but make sure you implement INotifyPropertyChanged to refresh the bindings on UI.

public PointCollection Points { get; set; }

And to bind on xaml you can do like this -

<Polyline Stroke="Transparent" Points="{Binding Points,
       RelativeSource={RelativeSource FindAncestor, AncestorType=UserControl}}"/>

How to bind a polyline in template?

1 Answers1