Hi you can achieve this while uploadin to your folder -
by this you can make your file name unique and with your username
if (ASPxUploadControl1.HasFile ) or
{
try
{
string extension = Path.GetExtension(ASPxUploadControl1.FileName);
string id = Guid.NewGuid().ToString();
string fileLocation = string.Format("{0}/{1}{2}", Server.MapPath("upload/"), id, extension);
ASPxUploadControl1.SaveAs( fileLocation );
StatusLabel.Text = "Upload status: File uploaded!";
}
catch (Exception ex)
{
StatusLabel.Text = "Upload status: The file could not be uploaded. The following error occured: " + ex.Message;
}
}