How to you add min and max lines to a line series chart?

[IDispose]

How do you indicate a range in a line series? I want to display a horizontal line at top indicating the Max of the series and another toward the bottom to indicate Min so users get a visual clue if values fall outside the said range. 

Can't find documentation.

Thanks

[Georgi]

Hello Ramesh,

Please refer to the support ticket you have submitted for the same issue. I am posting the reply here so that other users can see it also:

This feature is currently not supported in our charting component. You can however implement it with minimal efforts - you can overlay the chart with two line shapes and update their X,Y values according to the LayoutSlot property of the Min/Max data points. Something like:

DataPoint point = this.radChart1.Series[0].DataPoints[5];
RadRect layoutSlot = point.LayoutSlot;

// update the line shape with the layout slot position

We will put this feature in our backlog repository and will do our best to implement it as soon as possible.
I would like to thank you for your feedback and for this feature request - I have updated your Telerik points for your time.
Greetings,
Georgi
the Telerik team

[Sergio]

I need to do exactly the same, but looks like you sample code is missing some lines.

Can you please verify again?

Thank you,
.Sergio

[Victor]

Hello Sergio,

Thanks for writing.
In order to implement this, you have to put a Canvas on top of the chart. Then, put two Line shapes in the canvas, one representing your min value and the other the max value. You can determine your min/max range arbitrarily or base it some of the chart's data points (you have access to them through the series' DataPoints property). If you choose to base your range on actual data points, please keep in mind that each point's layout slot is in the same coordinate system as the chart's plot area. You can get the plot area layout slot via the PlotAreaClip property of RadChart.

I hope that's helpful, if you have other questions, please write again.

Greetings,
Victor
the Telerik team