protected void btnRemoveImgPicture3_ServerClick(object sender, EventArgs e)
        {
            if (Session["Image3"] != null)
                {
                    imageUtil = new ImageUtility();
                    string realPhysicalPath = Server.MapPath("~/img/blog/blog-thumb-1.jpg");

                        imgVehiclePicture3.Src = imageUtil.getBase64String(realPhysicalPath);
                        Session.Remove("Image3");
                        imageUtil = null;
                }
        }
        protected void btnUploadImgPicture1_ServerClick(object sender, EventArgs e)
        {
            if (filePicture1.HasFiles)
            {
                int count = 0;
                foreach (HttpPostedFile file in filePicture1.PostedFiles)
                {
                    count++;
                    imageUtil = new ImageUtility();
                    string realPhysicalPath = Path.Combine(Server.MapPath("~/upload/"), file.FileName);
                    file.SaveAs(realPhysicalPath);
                    //imgVehiclePicture1.Src = realPhysicalPath;

                    //imgVehiclePicture.Attributes["src"] = imageUtil.getBase64String(realPhysicalPath);
                    Session.Add("Image"+count, realPhysicalPath);
                    imageUtil.Dispose();

                    filePicture1 = null;
                    GC.Collect();

                }

                imgVehiclePicture1.Attributes["src"] = imageUtil.getBase64String(Session["Image1"].ToString());
                if (Session["Image2"] != null)
                {
                    imgVehiclePicture2.Attributes["src"] = imageUtil.getBase64String(Session["Image2"].ToString());
                }
                if (Session["Image3"] != null)
                {
                    imgVehiclePicture3.Attributes["src"] = imageUtil.getBase64String(Session["Image3"].ToString());
                }
            }
        }