如何获取中继器中属性的最后一个元素的值

Question

     <asp:Repeater ID="ReptServices" runat="server" OnItemDataBound="ReptServices_OnItemDataBound">
                      <b>
                  <td>    <%# Eval("ApplicationSteps") %></td>
                     <td><%# Eval("Service.ServiceName") %></td>
                            <td>
                                <b><%# Eval("BeneficiaryUserUnitJob.User.NameAr") %>  </b>
                            </td>
                            <td><%# Eval("DateCreated") %></td>
                      </b>
       </asp:Repeater>

this repeater filled in c# as

ReptServices.DataSource = new ApplicationLogic(ApplicationType.Web).GetAllOutboxApplication(_currentUserUnitJob);

"ApplicationSteps"property contains many elements,which contains another property called submitactiontypeid as this image shows:

I want to get the value of submitactiontypeid which exist in the last elment of ApplicationSteps

I asked what I shall write in <%# Eval("ApplicationSteps") %>

Answer 1

I came with a different solution for you.

If you are not available to modify your code behind, still we don't need the repeater to solve.

<%
var repeaterDataSource = (dynamic)ReptServices.DataSource;
foreach (var item in repeaterDataSource)
{%>

<%=item.ApplicationSteps %>

<%}%>

This is your basic Repeater. Because of I do not know what your data type that you bind to the repater, I use dynamic type.

You can modify for your purpose.

<%=item.ApplicationSteps.Last().SubmitActionTypeId  %>

First, debug without adding this line. If it works fine, add the code above and try again.

Answer 2

If you just need to render that value in the page then the repeater is useless. Try this code:

ASP

<asp:Label runat="server" ID="SubmitActionType"></asp:Label>

Then Server side (C#)

using System;
using System.Collections.Generic;
using System.Linq;

public partial class WebForm1 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        var applicationSteps = GetApplicationSteps(); //Call the function that gives you the data you need

        var lastElement = applicationSteps.Last(); //Get the last element

        SubmitActionType.Text = lastElement.SubmitActionTypeId;
    }
}

The repeater is useful when you need to render some html for each value inside an array of objects. In this case you are clearly not doing that.