how to get website root path in c#?

Question

In c# code, I need to write src for an image. Does anyone know how to get website root path in c#? My folder structure is UI/Image I found that when I use

string rootpath=Page.Request.ApplicationPath;

If run the application in debug model, it works. But if run it by typing url directly, it won't show image. The property of the image is http://image/turnon.bmp which should be http://localhost/image/turnon.bmp

Any idea?

Answer 1

Simple use the ~ sign

as the ~ represents the root of your app.

so yourimage url will be

<img    src='<%= Server.MapPath("~/images/1.jpg") '  />

Answer 2

An easy way is use MapPath with the ~ wildcard:

string imagePath = MapPath("~/image/turnon.bmp");

As Dan Csharpster stated in the comments, since the Server object which exposes the MapPath method is not directly available in a class library the command should be

string imagePath = HttpContext.Current.Server.MapPath("~/image/turnon.bmp");