protected void lbtThem_Click(object sender, EventArgs e)
    {
        string         error = "";
        ChuyenMucClass cmc   = new ChuyenMucClass();

        if (txtTenChuyenMuc.Text == "")
        {
            ScriptManager.RegisterStartupScript(this, this.GetType(), "Alert", "alert('Bạn chưa nhập tên chuyên mục');", true);
        }
        else
        {
            cmc.Category_Edit(0, int.Parse("0" + drChuyenMucChaEdit.SelectedValue),
                              txtTenChuyenMuc.Text + "", txtLink.Text + "", ref error);
            if (error + "" != "")
            {
                ScriptManager.RegisterStartupScript(this, this.GetType(), "Alert", "alert('" + error + "');", true);
                LoadGridChuyenMuc(0);
                ResetForm();
                LoadDropChuyenMuc(drChuyenMucChaEdit, 0);
            }
        }
        cmc = null;
    }
    private void LuuCM(int cateid)
    {
        string         error = "";
        ChuyenMucClass cmc   = new ChuyenMucClass();

        if (txtTenChuyenMuc.Text + "" == "")
        {
            ScriptManager.RegisterStartupScript(this, this.GetType(), "Alert", "alert('Bạn chưa nhập tên cho chuyên mục');", true);
        }
        else
        {
            cmc.Category_Edit(cateid, int.Parse("0" + drChuyenMucChaEdit.SelectedValue),
                              txtTenChuyenMuc.Text + "", txtLink.Text, ref error);
            if (error + "" != "")
            {
                ScriptManager.RegisterStartupScript(this, this.GetType(), "Alert", "alert('" + error + "');", true);
                LoadGridChuyenMuc(0);
                ResetForm();
                LoadDropChuyenMuc(drChuyenMuc, 0);
                LoadDropChuyenMuc(drChuyenMucChaEdit, 0);
            }
        }
        cmc = null;
    }