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    <p>I'v been doing it like this. Take this as an example RenderingTemplate:</p> <pre><code>&lt;SharePoint:RenderingTemplate ID="ParentItemsListView" runat="server"&gt; &lt;Template&gt; &lt;table cellpadding=0 cellspacing=0&gt; &lt;tr&gt;&lt;td nowrap class="UserGenericHeader"&gt;&lt;asp:Label ID="lblParentItems" runat="server" /&gt;&lt;/td&gt;&lt;/tr&gt; &lt;tr&gt;&lt;td&gt;&lt;SharePoint:ListViewByQuery ID="listViewByQuery" runat="server" /&gt;&lt;br /&gt;&lt;/td&gt;&lt;/tr&gt; &lt;/table&gt; &lt;/Template&gt; &lt;/SharePoint:RenderingTemplate&gt; </code></pre> <p>Then in Render event i can reference these controls like this:</p> <pre><code> [SharePointPermission(SecurityAction.Demand, ObjectModel = true)] protected override void Render(HtmlTextWriter output) { if (this.Visible) { Label lblParentItems = this.TemplateContainer.FindControlRecursive&lt;Label&gt;("lblParentItems"); lblParentItems.Text = "Pievienotie " + this.ChildList.Title; ListViewByQuery listView = TemplateContainer.FindControlRecursive&lt;ListViewByQuery&gt;("listViewByQuery"); listView.List = this.ChildList; ... base.Render(output); } } </code></pre> <p>Ahh, yes, i use a handy extension function</p> <pre><code>public static T FindControlRecursive&lt;T&gt;(this Control parentControl, string id) where T : Control { T ctrl = default(T); if ((parentControl is T) &amp;&amp; (parentControl.ID == id)) return (T)parentControl; foreach (Control c in parentControl.Controls) { ctrl = c.FindControlRecursive&lt;T&gt;(id); if (ctrl != null) break; } return ctrl; } </code></pre> <p>However i had an issue where i inherited from <code>SaveButton</code> that i couldn't reference a control. In that case i changed so that i inherit from <code>FormControl</code> and i could find my control under <code>this.Controls</code>.</p> <p>Also note that you cannot reference controls up until OnLoad event has executed (i.e if you're in OnLoad function, call <code>base.OnLoad(e)</code> before referencing controls.</p> <p>Why is it so? I guess because it's not like you are having a template and then code behind (working with the same class/object), but it's more like you are rendering that ascx template in a different class/object file.</p>
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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