ASP.NET2.0中用updatefile控件上传文件

Boolean fileOK = false;
       
        String path = Server.MapPath("~/TspSystem/DemandManagerModule/");
        if (FileUpload1.HasFile)
        {
            String fileExtension =
                System.IO.Path.GetExtension(FileUpload1.FileName).ToLower();
            String[] allowedExtensions =
                { ".gif", ".png", ".jpeg", ".jpg", ".doc" };
            for (int i = 0; i < allowedExtensions.Length; i++)
            {
                if (fileExtension == allowedExtensions[i])
                {
                    fileOK = true;
                }
            }
        }

        if (fileOK)
        {
            try
            {
                FileUpload1.PostedFile.SaveAs(path
                    + FileUpload1.FileName);
                WebUtils.MsgBox(this,"File uploaded!");

            }
            catch (Exception ex)
            {
                WebUtils.MsgBox(this,"File could not be uploaded.");

            }
        }
        else
        {
            WebUtils.MsgBox(this,"Cannot accept files of this type.");
        }