protected void LinkButton2_Click(object sender, EventArgs e)
    {
        String brand = TextBox1.Text;
        String modelName = TextBox2.Text;
        String modelNum = TextBox3.Text;
        String carAvailableDate = TextBox4.Text;
        String frontImg = FileUpload1.PostedFile.FileName;
        String sideImg = FileUpload2.PostedFile.FileName;
        String rearImg = FileUpload3.PostedFile.FileName;

        String frontImgFolder = HttpContext.Current.Server.MapPath("~\\Car\\Front");
        String frontImgTarget = Path.Combine(frontImgFolder, frontImg);
        FileUpload1.SaveAs(frontImgTarget);

        String sideImgFolder = HttpContext.Current.Server.MapPath("~\\Car\\Side");
        String sideImgTarget = Path.Combine(sideImgFolder, sideImg);
        FileUpload2.SaveAs(sideImgTarget);

        String rearImgFolder = HttpContext.Current.Server.MapPath("~\\Car\\Rear");
        String rearImgTarget = Path.Combine(rearImgFolder, rearImg);
        FileUpload3.SaveAs(rearImgTarget);

        DatabaseHandler obj = new DatabaseHandler();
        obj.InsertUpcomingCar(brand, modelName, modelNum, frontImgTarget, sideImgTarget, rearImgTarget, carAvailableDate);

        Response.Write("Car Added");
        TextBox1.Text = "";
        TextBox2.Text = "";
        TextBox3.Text = "";
        TextBox4.Text = "";
    }