How to define the Maximum/Minimum in code?

[Eitan]

Hi,

I have this XAML that defines the Maximum & Minimum. 

I need to define these parameters in my C# application.

Thanks,
Eitan Barazani

<chart:RadCartesianChart.VerticalAxis>
    <chart:LinearAxis Maximum="250" Minimum="150" /> </chart:RadCartesianChart.VerticalAxis>

[Lancelot]

Hi Eitan,

You'll need to define the vertical axis in your page class. You can do that simply by adding an x:Name="exampleVerticalAxis" to the xaml.  Then in your code behind, set the parameters through the instantiated axis name.   Like this:

exampleVerticalAxis.Maximum = 250;
exampleVerticalAxis.Minimum = 150;

You can do this in the contructor or in a Loaded event. In your case I would remove the explicit values from the xaml and replace it with only the x:Name value 


Good Luck,
Lancelot

[Eitan]

Hi,

I defined it in the Loaded event like you said.

Minimum is always set to 0. Maximum is set to the maximum of the series (your component calculates it automatically).

If I set Minimum/Maximum in XAML then Minimum/Maximum are correct on the graph.

Can it be that you have a bug here? or maybe I declare verticalAxis wrong?

Thanks,
Eitan

============================================

Doesn't work for Minimum or Maximum

<chart:RadCartesianChart.VerticalAxis>
    <chart:LinearAxis x:Name="verticalAxis"/>
</chart:RadCartesianChart.VerticalAxis> 

-----------------------------------------------
verticalAxis = new LinearAxis(); 
verticalAxis.Minimum = 100;
verticalAxis.Maximum = 200; 

================================================

[Victor]

Hello Eitan,

Thanks for the question.
This is a bug indeed however it is a bug of the Silverlight framework itself. Since the chart axes are declared in RadChart's HorizontalAxis and VerticalAxis properties, Silverlight fails to assign them at run-time to the auto-generated verticalAxis field because the FindName method returns null. Silverlight has a broken notion of the visual and logical trees (as defined in WPF) and for unknown reasons combines them in one tree resulting in this behavior.

In order to obtain a reference to your vertical axis you need to set x:Name="chart" on your chart (for example) and then do this in C# after the InitializeComponent() method of your page has finished executing:

(this.chart.VerticalAxis as LinearAxis).Maximum = 200;

The same is true for the chart series as described here.

Please write again if you have other questions.

All the best,
Victor
the Telerik team