protected void cbo_chuyenmuc_SelectedIndexChanged(object sender, EventArgs e)
        {
            NguoidungDAL _Obj  = new NguoidungDAL();
            int          catid = 0;

            try
            {
                catid = int.Parse(cbo_chuyenmuc.SelectedValue);
            }
            catch {; }
            DataTable dt = _Obj.GetAllUser_By_CatID(catid);

            drop_User.DataSource = null;
            drop_User.DataBind();
            if (dt != null)
            {
                if (dt.Rows.Count > 0)
                {
                    drop_User.DataSource     = dt;
                    drop_User.DataTextField  = "Fullname";
                    drop_User.DataValueField = "Ma_Nguoidung";
                    drop_User.DataBind();
                    drop_User.Items.Add(new ListItem(CommonLib.ReadXML("lblTatca"), "0"));

                    drop_User.SelectedValue = "0";
                }
            }
        }
        public void LoadTacgia()
        {
            NguoidungDAL _Obj = new NguoidungDAL();
            DataTable    dt   = _Obj.GetAllUser_By_CatID(0);

            Drop_Tacgia.DataSource = null;
            Drop_Tacgia.DataBind();
            if (dt != null)
            {
                if (dt.Rows.Count > 0)
                {
                    Drop_Tacgia.Items.Add(new ListItem("<<-----Tác giả----->>", "0", true));
                    for (int i = 0; i <= dt.Rows.Count - 1; i++)
                    {
                        this.Drop_Tacgia.Items.Add(new ListItem(dt.Rows[i]["Fullname"].ToString(), dt.Rows[i]["Ma_Nguoidung"].ToString()));
                    }
                }
            }
        }
        private void LoadCombox()
        {
            NguoidungDAL _Obj = new NguoidungDAL();

            UltilFunc.BindCombox(cbo_chuyenmuc, "Ma_ChuyenMuc", "Ten_ChuyenMuc", "T_ChuyenMuc", string.Format("  HoatDong = 1 and HienThi_BDT = 1 "), CommonLib.ReadXML("lblTatca"), "Ma_Chuyenmuc_Cha", " Order by ThuTuHienThi ASC");
            drop_User.Items.Clear();
            DataTable dt = _Obj.GetAllUser_By_CatID(0);

            if (dt != null)
            {
                if (dt.Rows.Count > 0)
                {
                    drop_User.Items.Add(new ListItem(CommonLib.ReadXML("lblTatca"), "0", true));
                    for (int i = 0; i <= dt.Rows.Count - 1; i++)
                    {
                        this.drop_User.Items.Add(new ListItem(dt.Rows[i]["Fullname"].ToString(), dt.Rows[i]["Ma_Nguoidung"].ToString()));
                    }
                }
            }
        }