[Solved] Range Slider Thumb Color

[Heather Kyle]

I am going to be adding a number of range sliders to a control, dynamically at runtime. Ideally, they will all have the same style, except for the thumb color. Is it possible to dynamically set the color of a Range Slider 'HorizontalRangeMiddleThumb' at run-time?

[Dimitrina]

Hello Heather Kyle,

This functionality is not supported by the control.

You can apply  a custom theme to RadSlider. For more information you can follow the link below:
http://www.telerik.com/help/silverlight/radcontrols-for-silverlight-expression-blend-support.html

If you have further  questions please do not hesitate to ask us.
I hope this will help you.

Best wishes,
Dimitrina
the Telerik team

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[Heather Kyle]

I actually found a fairly easy work-around for this problem. I set the background color for the thumb to a SolidColorBrush that was defined in the Control.Resources. I manipulate that color through a property in the code-behind, and voilà--the thumbs are the colors I want them to be.
In the .xaml file:

<Canvas.Resources>
        <SolidColorBrush x:Key="BackgroundBrush" Color="DarkGray" />
...
        <Border Background="{StaticResource BackgroundBrush}" />
...
</Canvas.Resources>

And in the .cs file:

public Color BackgroundColor
{
     set
     {
          if (this.Resources.Contains("BackgroundBrush"))
          {
               object brush = this.Resources["BackgroundBrush"];
               if (brush != null)
               (brush as SolidColorBrush).Color = value;
          }
     }
}