Question

我对ASP很新，我对此感到有点难过。我有一个转发器（basicInfoReport）链接到数据源（basicInfo）。这部分工作正常;转发器中的Eval次调用正在返回正确的数据。

我还有一些代码隐藏，它打算在页面上设置文本代替<asp:Literal>。我把两个片段都放在下面。

据我所知，转发器正在被数据绑定（因为Eval调用正在工作），所以我无法解决的是为什么它报告零项，因此{{1声明什么都不做。有人可以帮忙吗？：）

编辑：已解决，请进一步查看更新后的代码

ASP（删除无关的内容）

foreach

C＃（删除无关的内容）

<asp:AccessDataSource ID="basicInfo" runat="server" 
    DataFile="~/Disasters.accdb" 
    SelectCommand="SELECT * FROM [DisasterTable] WHERE ([ID] = ?)">
    <SelectParameters>
        <asp:QueryStringParameter Name="ID" QueryStringField="ID" Type="Int32" />
    </SelectParameters>
</asp:AccessDataSource>

<asp:Repeater ID="basicInfoReport" runat="server" DataSourceID="basicInfo" 
    onitemdatabound="basicInfoReport_ItemDataBound">
<ItemTemplate>
<h2>Disaster report: <%#Eval("Description")#%></h2>
<b><i>This report is confidential.</i></b><br /><br /><br />

This event was reported on <tt><%#Eval("dateReported")#%></tt>. It was reported  <asp:Literal ID="_wasReportedAnonymously" runat="server"></asp:Literal> and is currently  <asp:Literal ID="_isEmergency" runat="server"></asp:Literal> classed as an emergency.
</ItemTemplate>
</asp:Repeater>

更新：感谢almog.ori的帮助，解决了这个问题。供我参考，这是工作代码：

C＃（删除无关的内容）

protected void basicInfoReport_ItemDataBound(object sender, RepeaterItemEventArgs e) {

// [...]

// reader refers to an OleDbDataReader that is used for some database interaction in this method.
// until this point, basicInfoReport has not been referenced at all.
if (reader[1].ToString().Equals("False"))
   {

     // at this point basicInfoReport.Items.Count is always zero

     foreach (RepeaterItem repeaterItem in basicInfoReport.Items) {

       // control never makes it this far

       if (repeaterItem.ItemType == ListItemType.Item || repeaterItem.ItemType == ListItemType.AlternatingItem)
          {

             Literal emergencyLiteral = (Literal)repeaterItem.FindControl("_isEmergency");

             emergencyLiteral.Text = "not";
           }
      }
   }

 // [...]

 }

Answer 1

您应该查看ItemDataBound事件的msdn文档，特别注意事件参数的用法。

      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) {

事件ItemDataBound向您发送eventargs中的“行”。所以你可以用它做你喜欢的事。您应该查看e.Item.DataItem，它将是绑定项目的数据项

asp：repeater.items.count始终为零

1 个答案: