无法访问＆lt; %%＆gt;内的控件（代码标签）在转发器的ItemTemplate中

Question

没有转发器这是有效的，但是在转发器中写这个只是编译错误

<asp:Repeater runat="server" ID="rep1">
    <ItemTemplate>
      <li>
          <o:TextBox runat="server" ID="txtLastName" />
<% 
//this doesn't works outside of the repeater but here it doesn't
txtName.Text = txtLastName.ClientID;
%>                               
          <o:TextBox runat="server" ID="txtName"  />
       </li>
     </ItemTemplate>
</asp:Repeater>

Answer 1

您只能在ItemTemplate <%# %>中使用DataBind语法。如果要引用其他控件，请使用NamingContainer。

<asp:Repeater runat="server" ID="rep1">
    <ItemTemplate>
      <li>
          <o:TextBox runat="server" ID="txtLastName" />
          <%# Container.FindControl("txtLastName").ClientID %>    
          <o:TextBox runat="server" ID="txtName"  />
       </li>
     </ItemTemplate>
</asp:Repeater>

否则，您始终可以挂钩ItemDataBound来操纵服务器端的控件。

protected void repeater_ItemDataBound(object sender, RepeaterItemEventArgs e)
{       
   if (e.Item.ItemType == ListItemType.Item 
                || e.Item.ItemType == ListItemType.AlternatingItem)
   {
       var txtLastName = e.Item.FindControl("txtLastName") as TextBox;
       var txtName = e.Item.FindControl("txtName") as TextBox;

       ...
   }
}