DataList中嵌套的DataList怎么给它绑值

Question

嵌套的那个DataList需要根据外面的DataList的一个值来显示内容 
比如说一个订单 要根据外面的DataList中的订单编号这个字段的值 然后在嵌套的DataList中显示这个订单包含的商品该怎么做？DataList

Answer 1

你可以参考一下，用的是Repeater，DataList差不多：http://blog.csdn.net/guwei4037/article/details/7404986

Answer 2

参考
http://blog.csdn.net/279503482/article/details/5685059

Answer 3

DataList1_ItemDataBound这个事件中这么写的        Label lab = (Label)DataList1.Items[e.Item.ItemIndex].FindControl("Label1");
        string orderId = lab.Text;
        DataList dl = e.Item.FindControl("DataList2") as DataList;
        dl.DataSource = om.SelOrderItemByOrderId(orderId);
        dl.DataBind();为什么Label那行总是报 索引超出范围

Answer 4

你一定要这么写：Label label= e.Item.FindControl("Label1") as Label;

Answer 5

你一定要这么写：Label label= e.Item.FindControl("Label1") as Label;
还是一样超出范围

Answer 6

前台代码：
<table border="1">
            <asp:DataList ID="DataList1" runat="server" 
                onitemdatabound="DataList1_ItemDataBound">
                <ItemTemplate>
                    <asp:HiddenField ID="HiddenField1" runat="server" Value='<%#Eval("id") %>' />
                    <tr>
                        <td>HiddenField1=<%#Eval("id") %>
                        </td>
                    </tr>
                    <asp:DataList ID="DataList2" runat="server">
                        <ItemTemplate>
                            <tr>
                                <td>
                                    <table border="1">
                                        <tr>
                                            <td>table1=<%#Eval("table1") %>
                                            </td>
                                        </tr>
                                    </table>
                                </td>
                            </tr>
                        </ItemTemplate>
                    </asp:DataList>
                </ItemTemplate>
            </asp:DataList>
        </table>
后台代码：        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                //绑定 外层 DataList
                DataList1.DataSource = TM.DBUtility.DbHelperSQL.GetDataTable("select top 5 * from Table_1"); ;
                DataList1.DataBind();
            }
        }
        //外层DataList绑定
        protected void DataList1_ItemDataBound(object sender, DataListItemEventArgs e)
        {
            DataList dl2 = (DataList)e.Item.FindControl("DataList2");            #region 方法一 外层DataList数据源包含内层DataList数据时            System.Data.DataTable dt = TM.DBUtility.DbHelperSQL.GetDataTable("select top 5 * from Table_2");
            //内层数据源添加一列
            dt.Columns.Add(new System.Data.DataColumn("id1"));
            foreach (System.Data.DataRow dr in dt.Rows)
            {
                //外层服务器控件赋值到内层数据源
                dr["table1"] = ((HiddenField)e.Item.FindControl("HiddenField1")).Value;
            }
            #endregion            #region 方法二 外层外层DataList数据源包含内层DataList数据条件时            dt = TM.DBUtility.DbHelperSQL.GetDataTable("select top 5 * from Table_2 where id1=" + ((HiddenField)e.Item.FindControl("HiddenField1")).Value);            #endregion            dl2.DataSource = dt;
            dl2.DataBind();
        }