//清空购物车
protected void BtnClearAll_Click(object sender, EventArgs e)
{
if (Session["UserId"] != null)
{
int uid = int.Parse(Session["UserId"].ToString());
if (!cartService.IsCartItemEmptyByUserId(uid))
{
cartService.ClearCartItemByUserId(uid);
Response.Write("<script>window.location.href='ProCart.aspx'</script>");
}
}
else
{
Response.Redirect("Login.aspx");
}
}