如何将URL绝对路径转换为相对路径

Question

例如，我有：

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

我希望它是：

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

（因为我目前在页面＆＃34;〜/ UI / Pages / Default.aspx＆＃34;，这是从根目录两层深处）

Answer 1

谢谢你，我终于通过使用VirtualPathUtility.MakeRelative得到了它。代码如下：

     /// <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;
    }