public void GetBrandByProduct()
    {
        Object FillBrand = new Object();

        FillBrand.Product_Name  = HiddenProductName.Value;
        FillBrand.Category_Name = HiddenCatagoryName.Value;
        DataTable dt = BSLAYER.BrandFill(FillBrand);

        DdlBrand.DataSource     = dt;
        DdlBrand.DataTextField  = "Product_Brand";
        DdlBrand.DataValueField = "Product_Brand";
        DdlBrand.DataBind();
        DdlBrand.Items.Insert(0, "--SORT BY BRAND--");
    }