ASP.NET ModelBinding Complex Objects / Nested ListViews

Question

I want to use asp.net webforms model binding and nest a listview in a listview. Is this possible?

Currently I have set DataKeyNames on the parent and use the [Control] attribute in the SelectMethod and the method gets called for every row int the parent but the parameter is null.

Any help is appriciated.

<asp:ListView ID="Topics" runat="server"
    ItemType="Topic"
    SelectMethod="Topics_GetData"
    DataKeyNames="ID" >
    <EmptyDataTemplate>
                <div class="notice">
                    There are no Questions.
                </div>
            </EmptyDataTemplate>
    <ItemTemplate>
        <div><%# Item.TopicName %></div>

        <asp:ListView ID="QuestionSetListView" runat="server"
            ItemType="Question"
            SelectMethod="QuestionListView_GetData"
                 DataKeyNames="ID">
                <EmptyDataTemplate>
                    <div class="notice">
                        There are no Questions.
                    </div>
                </EmptyDataTemplate> ...

The select method :

QuestionListView_GetData([Control("Topics")] int? ID)

Any thoughts?

Thanks

graham mendick · Accepted Answer · 2014-03-19 19:09:43Z

3

Great to see someone doing cool things with Web Forms model binding. You can definitely do it, you just need to use a HiddenField to hold your ID,

<div><%# Item.TopicName %></div>
<asp:HiddenField ID="TopicID" runat="server" Value="<%# Item.ID %>" />
<asp:ListView ID="QuestionSetListView" runat="server"

And then refer to the TopicID in your Control Attribute

QuestionListView_GetData([Control("TopicID")] int? ID)

answered Mar 19, 2014 at 19:09

graham mendick

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2 Comments

user2556423 Over a year ago

Nice!!! now I need to figure out how do this with formview to insert these objects in the db.

graham mendick Over a year ago

Glad you liked it, a FormView works pretty much the same. I've done some examples with a FormView inside a ListView if you're interested? Have a look at my 'Navigation Identity for VS 2013.zip' sample available at navigation.codeplex.com/documentation

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