To make customizing the appearance of RadSlider as easy as possible, the control uses skins. A skin is a set of images and a CSS stylesheet that are applied to the HTML elements which make up the RadSlider control, defining the look and feel.
To apply a skin, set the Skin property of the RadSlider control. Set the Skin property using the Properties Window or the control's Smart Tag.
RadSlider is installed with a number of preset skins. These are shown below:
The Material skin is available for the Lightweight RenderMode only. If you experience visual issues with it, make sure your controls are not using the default Classic mode.
You can tweak the existing skins, or create your own. Each skin has two main elements: images and a stylesheet. When creating your own, it is a good idea to start with the stylesheet for an existing skin and alter that. See the Tutorial: Creating a Custom Skin topic for a step-by-step walk through. To use your own skin
Add the new CSS file to your project.
Drag and drop the CSS file from the Project Explorer onto your Web page.
Set the EnableEmbeddedSkins property of the controls that use the skin to False.
The stylesheet for a RadSlider skin has the name RadSlider.[SkinName].css and can be found in the ...Skins/[SkinName] directory. The images are found in the ...Skins/[SkinName]/Slider directory. For example, the stylesheet for the "Black" skin is called Slider.Black.css and is located in the ...Skins/Black directory. The images are found in the ...Skins/Black/Slider directory. The images are referenced by name from within the stylesheet.
For information on the CSS File structure, see the Understanding the Skin CSS File topic.