how to store the uploaded txt or .doc or jpg file in to webserver by dynamically

[sasindagi]

how to create new folder for each user who uploads .doc,.txt,.png,.jpg into web server. user may select his own type of uploads file depending upon file extension new folder must be created.
eg: user wish to upload a .doc file
then i want to create dynamically
http://localhost/test/user1/doc/xyz.doc
test- name of project
user1-user name who has uploaded
doc- folder name becoz .doc file uploaded
xyz.doc- name of the file

[jamello]

Can the user successfully upload his files?
New folders can be created. Confirm and get back to me

[sasindagi]

am creating new folder for each user who uploads any files. all the uploaded files will be in that folder.
here is sample
file upload

    if ((FileUpload1.PostedFile != null) && (FileUpload1.PostedFile.ContentLength > 0))
    {
        System.IO.Directory.CreateDirectory(Server.MapPath("Upload" + "/" + Request.Cookies["uname"].Value.ToString()));
        string a;
        string fn = System.IO.Path.GetFileName(FileUpload1.PostedFile.FileName);
        SaveLocation = "Upload" + "/" + Request.Cookies["uname"].Value.ToString() + "/" + fn;
        a = Server.MapPath("Upload" + "/" + Request.Cookies["uname"].Value.ToString()) + "/" + fn;
        try
        {
            FileUpload1.PostedFile.SaveAs(a);
        }
        catch (Exception ex)
        {
            Response.Write("Error: " + ex.Message);

        }

    }

here above code is used to create a new folder with his name.