File Uploading using Server.MapPath() and FileUpload.SaveAs()

Question

I have a website admin section which I'm busy working on, which has 4 FileUpload controls for specific purposes. I need to know that, when I use the Server.MapPath() Method Within the FileUpload control's SaveAs() methods, Will it still be usable on the web server after I have uploaded the website? As far as I know, SaveAs() requires an absolute path, that's why I map a path with Server.MapPath()

if (fuLogo.HasFile) //My FileUpload Control : Checking if a file has been allocated to the control
        {
            int counter = 0;  //This counter Is used to ensure that no files are overwritten.
            string[] fileBreak = fuLogo.FileName.Split(new char[] { '.' });
            logo = Server.MapPath("../Images/Logos/" + fileBreak[0] + counter.ToString()+ "." + fileBreak[1]);  // This is the part Im wondering about. Will this still function the way it should on the webserver after upload?
            if (fileBreak[1].ToUpper() == "GIF" || fileBreak[1].ToUpper() == "PNG")
            {
                while (System.IO.File.Exists(logo))
                {
                    counter++; //Here the counter is put into action
                    logo = Server.MapPath("../Images/Logos/" + fileBreak[0] + counter.ToString() + "." + fileBreak[1]);
                }
            }
            else
            {
                cvValidation.ErrorMessage = "This site does not support any other image format than .Png or .Gif . Please save your image in one of these file formats then try again.";
                cvValidation.IsValid = false;
            }
            if (fuLogo.PostedFile.ContentLength > 409600 )  //File must be 400kb or smaller
            {
                cvValidation.ErrorMessage = "Please use a picture with a size less than 400 kb";
                cvValidation.IsValid = false;

            }
            else
            {

                if (fuLogo.HasFile && cvValidation.IsValid)
                {
                    fuLogo.SaveAs(logo); //Save the logo if file exists and Validation didn't fail. The path for the logo was created by the Server.MapPath() method.
                }

            }
        }
        else
        {
            logo = "N/A";
        }

Answer 1

• If you intend to save the files in a directory on your web server, then the Server.MapPath() will be the suitable solution.

  string dirPath = System.Web.HttpContext.Current.Server.MapPath("~") + "/Images/Logos/"+ fileBreak[0] + counter.ToString() + "." + fileBreak[1];

  Look Here

• if you intend to save your files out the web server then

  Use a full path, like "c:\uploads" and be sure that the web process has permission to write to that folder,I suggest you store the path itself in the web.config file in this case.

Answer 2

yes, that can be used after saving file and when you try retrieve that file...

Server.MapPath("~/Images/Logos/" + uploadedFileName);

Answer 3

Yes it should still work as Server.MapPath uses the relative values and returns the complete physical path.

Answer 4

It's one line of code:

 FileUpload1.PostedFile.SaveAs(Server.MapPath(" ")+"\\YourImageDirectoryOnServer\\"+FileUpload1.FileName);