How to convert an URL absolute path to relative path

Question

For example, I have:

string AbsImgURL = "~/MyStuff/Images/MsgBoxIcon/MyImg.jpg";

I want it to be:

string AbsImgURL = "../../MyStuff/Images/MsgBoxIcon/MyImg.jpg"

(Because I am currently at the page "~/UI/Pages/Default.aspx", which is two level deep from the root)

Answer 1

Thanks guy, I have finally get it worked by using VirtualPathUtility.MakeRelative. The code is below:

     /// <summary>Convert and URL Absoluate Path to Relative Path 
     ///(For Example: "~/MyStuff/Images/MsgBoxIcon/MyImg.jpg" ==> "../../MyStuff/Images/MsgBoxIcon/MyImg.jpg"
     ///(Assuming client is currently at the page "~/UI/Pages/Default.aspx", which is two level deep from the root).</summary>
    private static string ConvertAbsoluteToRelativePath(string Input)
    {
        //Init
        string Output = "";

        //Get Current URL (Ex: http://MyWebSite//...)
        string CurrentURL = HttpContext.Current.Request.Url.AbsolutePath;

        //Convert to Relative Path
        Output = VirtualPathUtility.MakeRelative(CurrentURL, Input);

        //Finally
        return Output;
    }