How to set bindings of range of axes

[darkeria]

Hello,I want to set the Maximum of Y-axis by using a viewmodel's property. I found a link at

http://zone.ni.com/reference/en-XX/help/372636F-01/mstudiowebhelp/html/wpfwritablegraphaxescursors/

which used xaml language to set range, but that's not exactly I wanted. Anyone can help me?

[phansen]

You can bind the Range property like any other dependency property; you just need to expose both the minimum and maximum through a Range<TData> object on your model.

    // Model
    public Range<double> ModelRange { get { ... } }

    // Y-Axis Binding
    <AxisDouble Orientation="Vertical" Range="{Binding ModelRange}" ...

[darkeria]

The AxisDouble doesn't contain a Source property nor a DataContext property. How can I set  the binding? I set the datacontext in NiGraph control and  tried to use "Range="{Binding ModelRange}"", but it didn't work.

[phansen]

I see what you mean now; appologies for not trying out a full example in the first place. It looks like the graph is not maintaining the logical tree for child components, which is preventing binding using the inherited data context. I have created a task to fix this.

The simplest workaround available is to expose your model as a resource. This will allow you to use Range="{Binding ModelRange, Source={StaticResource ModelResourceKey}}" to explicitly define the source of the binding.

Here is a full XAML example demonstrating this approach to binding Range on an axis (and how to initialize DataContext for other elements):

    <Grid>
        <Grid.Resources>
            <my:Model x:Key="model" />
        </Grid.Resources>

        <ni:Graph DataContext="{StaticResource model}">
            <ni:Graph.Axes>
                <ni:AxisDouble Range="{Binding ModelRange, Source={StaticResource model}}" />
            </ni:Graph.Axes>
        </ni:Graph>
    </Grid>

[darkeria]

Yes, that's a good solution.Thanks.

[phansen]

Just wanted to let you know this issue was fixed in the Measurement Studio 2015 release.

[gtaillefer]

I have the Range of my AxisDouble binding with my model ok but the RangeCurser.VerticalRange does not.