Find the Directory of folder in root from a aspx page which is inside a folder in asp.net

Question

I have a aspx page to upload image to a folder.The aspx page is inside a folder called admin. If i keep the aspx page in the root directory i am able to upload file in the Image folder since both are in the root directory.
But when i do the same keeping the aspx page inside a folder,it shows Could not find a part of the path 'C:\\Users\\...
So how do i provide path such that i am able to upload image in a folder from a page which is also inside a folder.

Here goes my code:

      if( fu_subcat.PostedFile.ContentLength>0 )
        {
          fn =Path.GetFileName(fu_subcat.PostedFile.FileName);
            fu_subcat.SaveAs(Server.MapPath("imag/" + fn));
        }

EDIT

It is mapping the path as: Could not find a part of the path 'C:\\Users\\lenovo\\Documents\\Visual Studio 2010\\WebSites\\emarket\\Admin\\imag

But i have the folder inside emarket as emarket\\imag not emarket\\Admin\\imag

Answer 1

最好将图像保存在单独的内容文件夹中，然后使用tilda在相对路径中引用图像，例如〜“ content / image”

Answer 2

使用〜将使您进入应用程序的虚拟根目录，因此Server.MapPath（“〜/ imag / ...”）应该可以。

Answer 3

This happens because when you call that code from

/Admin/page.aspx

Server.MapPath returns a path which is relative to /Admin/ - so the final path would be /Admin/imag/... To set path from the root you should add a / in front of the path.

Must be

fu_subcat.SaveAs(Server.MapPath("/imag/" + fn));

Notice / in front of the string.

Alternatively you can also add a ~ tilde

fu_subcat.SaveAs(Server.MapPath("~/imag/" + fn));

which points to a root of the current ASP.net application. This will be useful if you application is running in a virtual directory and as a part of global application.