leodo@blog

if( ( File1.PostedFile != null ) && ( File1.PostedFile.ContentLength > 0 ) )
{
      string fn = System.IO.Path.GetFileName(File1.PostedFile.FileName);
      string SaveLocation = Server.MapPath("Document") + "\\" +  fn;
      try
     {   
          File1.PostedFile.SaveAs(SaveLocation);
          Response.Write("The file has been uploaded.");
      }
      catch ( Exception exp )
      {
          Response.Write("Error: " + exp.Message);
      }
}
else
{
     Response.Write("Please select a file to upload.");
}

PS: ASP.NET 只允許將 4,096 KB（即 4 MB）以下的小檔案，較大文件有大文件的上傳方式