请问一个GridView绑定的问题


//这个是在逻辑层写的绑定代码
        public void NewsManageDG(GridView GV)
        {
            DataTable dt = new DataTable();
            dt = DBhelper.TableQuery("select ArticleTitle,ArticleTime,ClassName,ArticleAddMan,ArticleTag From ArticleContent");
            GV.DataSource = dt;
            GV.DataBind();
        }//这个是在界面层写的代码
<asp:GridView Width="100%" ID="NewsManageDG" runat="server" Font-Size="12px" AllowPaging="True" 
                        PageIndex="1" BorderColor="#ACAC82" BorderStyle="Solid" BorderWidth="1px">
                        <Columns>
                            <asp:BoundField DataField="BoxID" HeaderText="ID" Visible="False" />
                            <asp:TemplateField HeaderText="选择">
                             <ItemTemplate>
                            <asp:CheckBox ID="ChkSelected"  runat="server" />
                            </ItemTemplate>
                            </asp:TemplateField>
                            <asp:BoundField DataField="ArticleTitle" HeaderText="物料代码" ReadOnly="True">
                                <ItemStyle HorizontalAlign="Left" VerticalAlign="Middle" />
                            </asp:BoundField>
                            
                            <asp:BoundField DataField="ArticleTime" HeaderText="物料名称" ReadOnly="True">
                                <ItemStyle HorizontalAlign="Left" VerticalAlign="Middle" />
                            </asp:BoundField>
                            
                            <asp:BoundField DataField="ClassName" HeaderText="物料描述" ReadOnly="True">
                              <ItemStyle HorizontalAlign="Left" VerticalAlign="Middle" />
                            </asp:BoundField>
                            
                            <asp:BoundField DataField="ArticleAddMan" HeaderText="单价" ReadOnly="True">
                               <ItemStyle HorizontalAlign="Left" VerticalAlign="Middle" />
                            </asp:BoundField>
                            
                            <asp:BoundField DataField="ArticleTag" HeaderText="数量">
                                <ItemStyle ForeColor="Red" HorizontalAlign="Center" VerticalAlign="Middle" />
                               <HeaderStyle HorizontalAlign="Center" VerticalAlign="Middle" />
                            </asp:BoundField>
                            
                            <asp:CommandField DeleteText="删除" ShowDeleteButton="true" />
                        </Columns>
                    </asp:GridView>
就是这样写会出现2个同样的数据 在界面定义的绑定会先显示 后面几列就是逻辑层绑定的数据请问怎么在逻辑层进行绑定 然后在UI层显示指定的内容呢！感谢大家