private void showPos_SizeProductData()
    {
        Pos_SizeProduct pos_SizeProduct = new Pos_SizeProduct();

        pos_SizeProduct = Pos_SizeProductManager.GetPos_SizeProductByID(Int32.Parse(Request.QueryString["pos_SizeProductID"]));

        ddlPos_Size.SelectedValue = pos_SizeProduct.Pos_SizeID.ToString();
        ddlProduct.SelectedValue  = pos_SizeProduct.ProductID.ToString();
    }
    protected void btnUpdate_Click(object sender, EventArgs e)
    {
        Pos_SizeProduct pos_SizeProduct = new Pos_SizeProduct();

        pos_SizeProduct = Pos_SizeProductManager.GetPos_SizeProductByID(Int32.Parse(Request.QueryString["pos_SizeProductID"]));
        Pos_SizeProduct tempPos_SizeProduct = new Pos_SizeProduct();

        tempPos_SizeProduct.Pos_SizeProductID = pos_SizeProduct.Pos_SizeProductID;

        tempPos_SizeProduct.Pos_SizeID = Int32.Parse(ddlPos_Size.SelectedValue);
        tempPos_SizeProduct.ProductID  = Int32.Parse(ddlProduct.SelectedValue);
        bool result = Pos_SizeProductManager.UpdatePos_SizeProduct(tempPos_SizeProduct);

        Response.Redirect("AdminPos_SizeProductDisplay.aspx");
    }