Repeater中OnItemDataBound使用方式

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今天遇到一个问题，在Repeater中绑定数据时候，还需要在Repeater中的添加子项目信息。

直接贴图：
这里写图片描述

在绑定题目的时候，需要将题目对应的问题选项给显示出来，这些数据来自不同的表中。属于一对多的关系。

   <asp:Repeater runat="server" ID="EQInfo"   OnItemDataBound="EQInfo_ItemDataBound" >                    <ItemTemplate>                        <tr>                            <td id="TableBodySelectColumn" runat="server">                                <input type="radio"  name="rad" value="<%#Eval("TID") %>" /></td>                            <td><%#Eval("TopicName") %></td>                            <td><%#OAS.Common.EnumDictionary.GetEnumDescription((Common.EnumDictionary.TopicType)Enum.Parse(typeof(Common.EnumDictionary.TopicType), Eval("TopicType").ToString()))%></td>                            <td class="td-has-select">                                <a tabindex="0" runat="server"  id="atabindex" class="btn btn-xs options-show" role="button" data-container="body" data-toggle="popover" data-trigger="focus" title="选项：" data-placement="left" data-html="true" data-content="">点击查看选项</a>                            </td>                            <td id="TableBodyOperationColumn" runat="server">                                <%--  <span class="glyphicon glyphicon-arrow-up" aria-hidden="true" onclick="UpItem(this);"></span>                                <span class="glyphicon glyphicon-arrow-down" aria-hidden="true" onclick="DownItem(this);"></span>--%>                                <asp:LinkButton class="glyphicon glyphicon-arrow-up" runat="server" aria-hidden="true" ID="UpItem" CommandName='<%#Eval("TID")%>' OnClick="UpItem_Click"></asp:LinkButton>                                <asp:LinkButton class="glyphicon glyphicon-arrow-down" runat="server" aria-hidden="true" ID="DownItem" CommandName='<%#Eval("TID")%>' OnClick="DownItem_Click"></asp:LinkButton>                            </td>                        </tr>                    </ItemTemplate>                </asp:Repeater>

   protected void EQInfo_ItemDataBound(object sender, RepeaterItemEventArgs e)        {            try            {                if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)                {                    HtmlAnchor atabindex = e.Item.FindControl("atabindex") as HtmlAnchor;                    A topic = e.Item.DataItem as A;                    List<A> options = new A().SelectBy(new A { TID = topic.TID });                    string strData = "";                    foreach (A item in options)                    {                        strData += item.OptionName + "</br>";                    } Label lblPID = e.Item.FindControl("lblPID") as Label;//如果是绑定的DataReader则找不到，不知何故。        lblPID.Text = drv["PID"].ToString();        TextBox txtPName = e.Item.FindControl("txtPName") as TextBox;        txtPName.Text = drv["pName"].ToString();                    atabindex.Attributes.Add("data-content", strData.TrimEnd());                }            }            catch (Exception)            {                throw;            }        }

在RepeaterItemEventArgs中有绑定行的数据，需要对数据进行强制转化，通过e取获取需要绑定的控件，每个前台标签都对应一个html控件。并且可以对该控件进行一系列设置。

以下是微软给出来的方案：

<%@ Page Language="C#" AutoEventWireup="True" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" > <head>    <title>OnItemDataBound Example</title><script language="C#" runat="server">       void Page_Load(Object Sender, EventArgs e) {          if (!IsPostBack) {             ArrayList values = new ArrayList();             values.Add(new Evaluation("Razor Wiper Blades", "Good"));             values.Add(new Evaluation("Shoe-So-Soft Softening Polish", "Poor"));             values.Add(new Evaluation("DynaSmile Dental Fixative", "Fair"));             Repeater1.DataSource = values;             Repeater1.DataBind();          }       }       void R1_ItemDataBound(Object Sender, RepeaterItemEventArgs e) {          // This event is raised for the header, the footer, separators, and items.          // Execute the following logic for Items and Alternating Items.          if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem) {             if (((Evaluation)e.Item.DataItem).Rating == "Good") {                ((Label)e.Item.FindControl("RatingLabel")).Text= "<b>***Good***</b>";             }          }       }           public class Evaluation {          private string productid;          private string rating;          public Evaluation(string productid, string rating) {             this.productid = productid;             this.rating = rating;          }          public string ProductID {             get {                return productid;             }          }          public string Rating {             get {                return rating;             }          }       }    </script> </head> <body>    <h3>OnItemDataBound Example</h3>    <form id="form1" runat="server">       <br />       <asp:Repeater id="Repeater1" OnItemDataBound="R1_ItemDataBound" runat="server">          <HeaderTemplate>             <table border="1">                <tr>                   <td><b>Product</b></td>                   <td><b>Consumer Rating</b></td>                </tr>          </HeaderTemplate>          <ItemTemplate>             <tr>                <td> <asp:Label Text='<%# DataBinder.Eval(Container.DataItem, "ProductID") %>' Runat="server"/> </td>                <td> <asp:Label id="RatingLabel" Text='<%# DataBinder.Eval(Container.DataItem, "Rating") %>' Runat="server"/> </td>             </tr>          </ItemTemplate>          <FooterTemplate>             </table>          </FooterTemplate>       </asp:Repeater>       <br />    </form> </body> </html>

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