dropdownlist及listbox的数据绑定

前台代码：

 

                        <asp:DropDownList ID="DDLsurveyitems" runat="server" Width="250">
                        </asp:DropDownList>

 

 

后台代码：

 

        DataTable ds = vote.getSurveyitemsmainAll();
        DDLsurveyitems.DataSource = ds;
        DDLsurveyitems.DataTextField = "SurveyItemMainName";
        DDLsurveyitems.DataValueField = "SurveyItemMainId";
        DDLsurveyitems.DataBind();