Asp.Net: Embed image in server control's assembly.

Question:

How to embed an image file  as an embedded resource in a server control assembly?
How to access an image from a server control assembly?

Answer:

First of all, the image file must be an embedded resource. (right-click on the file and set Build Action to Embedded Resource.)

Follow these steps:

1. Register a WebResource for the image file in the AssemblyInfo.cs

   ...
   [assembly: System.Web.UI.WebResource("myImage.gif", "img/gif")];
   ...
   

2. Get the image URL from the ClientScript manager. (in the OnPrerender event)

   Image img = new Image();
   string imgUrl = Page.ClientScript.GetWebResourceUrl(this.GetType(), "myImage.gif");
   img.ImageUr = imgUrl;
   

All resources embedded within an assembly will be included into the client page through a WebResource.axd request with a funny looking URL. But that should be transparent to you.