Databases
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    <p>You should not call <code>commentRadGrid.DataBind()</code> inside <code>commentRadGrid_NeedDataSource</code> event.</p> <p><a href="http://www.telerik.com/help/aspnet-ajax/grid-advanced-data-binding.html" rel="nofollow">Advanced Data-binding (using NeedDataSource event)</a></p> <blockquote> <p>You should never call the Rebind() method in a NeedDataSource event handler.You should never call DataBind() as well when using advanced data binding through NeedDataSource. For Microsoft GridView-like data binding, see Simple Data-binding.</p> </blockquote> <h2>Update:</h2> <p>If you set <code>AllowCustomPaging="True"</code>, you will need to provider <code>VirtualItemCount</code>.</p> <p>It basically means you are giving RadGrid to maximum 100 rows (<code>PageSize="100"</code>) although you have a million records. Therefore, RadGrid need to know how many total records you have in order to display pagination.</p> <p><em><strong>Note:</em></strong> If you have only few records, you want to provide all records to RadGrid. If so, you do not need both <code>AllowCustomPaging="True"</code> and <code>VirtualItemCount</code>.</p> <p>Here is the sample example -</p> <pre><code>&lt;asp:ScriptManager ID="ScriptManager1" runat="server" /&gt; &lt;telerik:RadGrid runat="server" ID="commentRadGrid" AllowFilteringByColumn="true" AutoGenerateColumns="True" AllowPaging="true" OnPageIndexChanged="commentRadGrid_PageIndexChanged" OnNeedDataSource="commentRadGrid_NeedDataSource" PageSize="100" Skin="Default" AllowSorting="true" ShowStatusBar="true" AllowCustomPaging="True" GridLines="none"&gt; &lt;/telerik:RadGrid&gt; &lt;asp:Button runat="server" ID="OlderCommentsButton" OnCommand="OlderCommentsButton_Click" Text="Post Back" /&gt; public class User { public string FirstName { get; set; } public string LastName { get; set; } } protected void commentRadGrid_NeedDataSource( object sender, GridNeedDataSourceEventArgs e) { var users = new List&lt;User&gt; { new User {FirstName = "John", LastName = "Doe"}, new User {FirstName = "Jenny", LastName = "Doe"}, }; commentRadGrid.DataSource = users; commentRadGrid.MasterTableView.VirtualItemCount = users.Count; } protected void OlderCommentsButton_Click(object sender, EventArgs e) { try { commentRadGrid.Rebind(); } catch (Exception ex) { } } protected void commentRadGrid_PageIndexChanged( object sender, GridPageChangedEventArgs e) { } </code></pre>
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    1. POWhy is the Telerik RadGrid disappearing on PostBack?
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    1. COI removed the commentRadGrid.DataBind() inside commentRadGrid_NeedDataSource, but it still fails to display the Telerik RadGrid on Postback.
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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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