How to list data retrieved from a table in aspx page web form

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C#

protected List<EventsTable> events;
       events = db.EventsTable.ToList();

*Aspx Page:
on this page i need to list all the events in table.
for example; i need to list a parent Event and its child events below . i.e
* music (parent)
house
urban
*games(parent)
ps4
xbox

This is what i have done so far.
As i mentioned i'm new to web forms but i have experience in MVC , so i'm trying to use the Aspx page as i would in a view in MVC.
I have a table like so:

C#

<table class="table">
                             <tr>
                                 <th>Event</th>
                                  <th>Edit</th>
                             </tr>
                      
                       <%foreach(var s in events) {%>
                             <tbody>
                                    <tr> 
                                 <%if (s.ParentId == 0)
                                     {%>
                                        <td> * <%= s.Name %></td>
                                  <%} %>
                              
                                      <td> <%= s.Name %></td>
                                     <td> <a> Edit</a></td>
                                 </tr>
                             </tbody>
                     
                    
                      <%}%>
                        
                          </table>

Could someone please direct me on how I would go about in listing the events in the way I've said above?
I'm not sure what the best option would be for me to achieve this in web forms.

What I have tried:

Quote:

C#

<table class="table">
                             <tr>
                                 <th>Event</th>
                                  <th>Edit</th>
                             </tr>
                      
                       <%foreach(var s in events) {%>
                             <tbody>
                                    <tr> 
                                 <%if (s.ParentId == 0)
                                     {%>
                                        <td> * <%= s.Name %></td>
                                  <%} %>
                              
                                      <td> <%= s.Name %></td>
                                     <td> <a> Edit</a></td>
                                 </tr>
                             </tbody>
                     
                    
                      <%}%>
                        
                          </table>

Posted 21-Aug-17 2:01am

1Future

Updated 21-Aug-17 4:14am

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Richard Deeming · Accepted Answer · 2017-08-21T04:14:00

Try something like this:

Code-behind:

C#

public IQueryable<EventsTable> GetTopLevelEvents()
{
    return db.EventsTable.Where(e => e.ParentId == 0);
}

public IQueryable<EventsTable> GetChildEvents(EventsTable parent)
{
    return db.EventsTable.Where(e => e.ParentId == parent.Id);
}

Markup:

<asp:ListView runat="server" SelectMethod="GetTopLevelEvents" ItemType="YourNamespace.EventsTable">
<LayoutTemplate>
    <table class="table">
    <thead>
        <tr>
            <th>Event</th>
            <th>Edit</th>
        </tr>
    </thead>
    <tbody>
        <tr id="itemPlaceholder" runat="server"/>
    </tbody>
    </table>
</LayoutTemplate>
<ItemTemplate>
    <tr>
        <th>* <%#: Item.Name %></th>
        <td>
            <a>Edit</a>
        </td>
    </tr>
    
    <asp:ListView runat="server" DataSource='<%# GetChildEvents(Item) %>' ItemType="YourNamespace.EventsTable">
    <ItemTemplate>
        <tr>
            <th><%#: Item.Name %></th>
            <td>
                <a>Edit</a>
            </td>
        </tr>
    </ItemTemplate>
    </asp:ListView>
</ItemTemplate>
</asp:ListView>

Model Binding and Web Forms in Visual Studio 2013 | Microsoft Docs[^]
ListView Class | Microsoft Docs[^]