RadControls for ASP.NET AJAX In some occasions you may want to display row numbers in Telerik RadGrid - for example to correlate the grid items when exporting the control's structure to Excel or just for easier navigation/access. The functionality is not built-in in the product, however such layout is achievable with a few lines of code:
Subscribe to the ItemDataBound event of the grid
Check whether the currently bound item is GridDataItem
Extract the ItemIndex of the e.Item instance and display its value in a control residing in GridTemplateColumn's ItemTemplate.
In the example code below the item index is presented in MS Label control which is wrapped in template column:
CopyASPX
<telerik:RadGrid ID="RadGrid1" DataSourceID="SqlDataSource1" AllowSorting="True"
Skin="Vista" runat="server" Width="95%" OnItemDataBound="RadGrid1_ItemDataBound">
<MasterTableView>
<Columns>
<telerik:GridTemplateColumn UniqueName="TemplateColumn" HeaderText="Row number">
<ItemTemplate>
<asp:Label ID="numberLabel" runat="server" Width="30px" />
</ItemTemplate>
<HeaderStyle Width="30px" />
</telerik:GridTemplateColumn>
</Columns>
</MasterTableView>
</telerik:RadGrid>
<br />
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:NorthwindConnectionString %>"
SelectCommand="SELECT [CustomerID], [CompanyName], [ContactName], [ContactTitle], [Address], [City], [Region], [PostalCode] FROM [Customers]">
</asp:SqlDataSource>CopyC#
protected void RadGrid1_ItemDataBound(object sender, Telerik.Web.UI.GridItemEventArgs e)
{
if (e.Item is GridDataItem && e.Item.OwnerTableView.DataSourceID == "AccessDataSource1")
{
Label lbl = e.Item.FindControl("numberLabel") as Label;
lbl.Text = (e.Item.ItemIndex + 1).ToString();
}
}CopyVB.NET
Protected Sub RadGrid1_ItemDataBound(ByVal sender As Object, ByVal e As Telerik.Web.UI.GridItemEventArgs)
If (TypeOf e.Item Is GridDataItem AndAlso e.Item.OwnerTableView.DataSourceID = "AccessDataSource1") Then
Dim lbl As Label = CType(e.Item.FindControl("numberLabel"), Label)
lbl.Text = (e.Item.ItemIndex + 1).ToString
End If
End Sub