WPF Legend Binded to Graph.

Question

Hi,
I have a ni:Legend object binded to the Plots of my Graph object. Which Property of my Plot should I set from the C# code to see it displayed in the Legend window?
   <ni:Legend Name="MyLegend" ItemsSource="{Binding ElementName=MyGraph, Path=Plots}" />
        <ni:Graph Name="MyGraph" DataSource="{Binding UpdateSourceTrigger=PropertyChanged}">
            <ni:Graph.Plots>
                <ni:Plot/>
            </ni:Graph.Plots>
</ni:Graph>
MyGraph.Plots[0].??? = ???
Solved!
Go to Solution.

Answer 1

The legend uses a WPF ContentPresenter to display the plot Label property. In the case of UI elements, it appears that ContentPresenter defaults to using the ToString representation, instead of the element itself.
To display content like "Something", you will want to assign that content directly to the plot Label property:
    MyGraph.Plots[0].Label = "Something";
If you want to specifically show a WPF Label content control in the legend, you can use the LabelTemplate property:
    <ni:Graph.Plots>
        <ni:Plot>
            <ni:Plot.LabelTemplate>
                <DataTemplate>
                    <Label Content="{Binding}" />
                </DataTemplate>
            </ni:Plot.LabelTemplate>
        </ni:Plot>
    </ni:Graph.Plots>
~ Paul H