RadarChart - Setting line thickness and color

[George]

Hi again,

I have successfully implemented a radar area line chart as per attached image. I have the following questions:

(a) How I can programmatically change the thickness of the displayed line?

(b) How I can change the colour of each category line depending on the value, e.g. value =100 will be red, value =10 will be blue and so on.

Regards,


George

[Dimitar]

Hello George,

Thank you for writing.

1. You can change the line thickness and color by changing the BorderColor and BorderWidth properties:

RadarLineSeries series = new RadarLineSeries();
series.Spline = true;

series.BorderColor = Color.DarkKhaki;
series.BorderWidth = 5;

2. If you want to change the grid lines color you can just set the grids ForeColor property:

PolarGrid grid = this.radChartView1.Area.GetGrid<PolarGrid>();
grid.ForeColor = Color.Red;

However you cannot set different color for each line. In this case I want to suggest you to set some custom background to the chart:

radChartView1.ChartElement.Image = Image.FromFile(@"C:\myImage.png");

Please let me know if there is something else I can help you with. 

 

Regards,
Dimitar
Telerik

 

 

[George]

Hi, thks for reply. If I cannot change the individual line color could you please guide me how to change the color as values change? I need to grasp the event that some value has changed and then to apply a color depending on the value.

Regards,

George

[George]

You mention:

[quote]However you cannot set different color for each line. In this case I want to suggest you to set some custom background to the chart:

radChartView1.ChartElement.Image = Image.FromFile(@"C:\myImage.png");

[/quote]

However from this link http://www.telerik.com/help/winforms/chartview-customization-custom-rendering.html   I can see that there is a way to do this for a line series, althaugh I am not sure how I can implement it for a radar line series.

[Dimitar]

Hi George, 

Thank you for writing back.

I was thinking that you want to change the grid lines (each category has a grid line that come from the chart center and goes to the category name). I noticed that you have posted a separated tread for this I am pasting the answer here in order the community to benefit from it:

The example can be recreated to draw different part of the line with a different color. However in this case there is no way to place the corresponding color to a specific place (line part) in the chart. Nevertheless I have attached the recreated sample in case you want to look at it.

Do not hesitate to contact us if you have other questions.

 

Regards,
Dimitar
Telerik