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Virtual Scrolling with Grouping

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Grid

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4 Answers, 1 is accepted

answered on 04 Aug 2011, 02:51 PM

VirtualScrollingWithGrouping.zip

Hello Michael,

I tried to replicate the described behaviour on my side but to no avail. Please find attached a sample runnable application which works correctly on my side and shows all the groups after groping. Test the application on your side and let me know if it works correctly and what the difference in your case is.

Regards,
Maria Ilieva
the Telerik team

Browse the vast support resources we have to jump start your development with RadControls for ASP.NET AJAX. See how to integrate our AJAX controls seamlessly in SharePoint 2007/2010 visiting our common SharePoint portal.

answered on 09 Aug 2011, 05:04 PM

If you add 'UnitsOnOrder' field to the query and group by UnitsOnOrder you will see the issue I am having.
Here is the changed code.

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="DefaultCS.aspx.cs" Inherits="DefaultCS" %>

<%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"

"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head id="Head1" runat="server">

<title></title>

</head>

<body class="BODY">

<form id="mainForm" method="post" runat="server">

<asp:ScriptManager ID="ScriptManager1" runat="server" />

<telerik:RadGrid runat="server" ID="RadGrid1" Width="600px" AllowPaging="True" CellSpacing="0"

DataSourceID="SqlDataSource1" GridLines="None" ShowGroupPanel="True">

<PagerStyle Visible="false" />

<ClientSettings AllowDragToGroup="True">

<Scrolling AllowScroll="true" EnableVirtualScrollPaging="true" />

</ClientSettings>

<MasterTableView AutoGenerateColumns="False" DataKeyNames="ProductID" DataSourceID="SqlDataSource1" GroupsDefaultExpanded="false">

<CommandItemSettings ExportToPdfText="Export to PDF"></CommandItemSettings>

<RowIndicatorColumn FilterControlAltText="Filter RowIndicator column">

</RowIndicatorColumn>

<ExpandCollapseColumn FilterControlAltText="Filter ExpandColumn column">

</ExpandCollapseColumn>

<Columns>

<telerik:GridBoundColumn DataField="ProductID" DataType="System.Int32" FilterControlAltText="Filter ProductID column"

HeaderText="ProductID" ReadOnly="True" SortExpression="ProductID" UniqueName="ProductID">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="ProductName" FilterControlAltText="Filter ProductName column"

HeaderText="ProductName" SortExpression="ProductName" UniqueName="ProductName">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="UnitPrice" DataType="System.Decimal" FilterControlAltText="Filter UnitPrice column"

HeaderText="UnitPrice" SortExpression="UnitPrice" UniqueName="UnitPrice">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="CategoryID" DataType="System.Int32"

FilterControlAltText="Filter CategoryID column" HeaderText="CategoryID"

SortExpression="CategoryID" UniqueName="CategoryID">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="UnitsOnOrder" DataType="System.Int16"

FilterControlAltText="Filter UnitsOnOrder column" HeaderText="UnitsOnOrder"

SortExpression="UnitsOnOrder" UniqueName="UnitsOnOrder">

</telerik:GridBoundColumn>

</Columns>

<EditFormSettings>

<EditColumn FilterControlAltText="Filter EditCommandColumn column">

</EditColumn>

</EditFormSettings>

</MasterTableView>

<FilterMenu EnableImageSprites="False">

</FilterMenu>

<HeaderContextMenu CssClass="GridContextMenu GridContextMenu_Default">

</HeaderContextMenu>

</telerik:RadGrid>

<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:NorthwindConnectionString %>"

SelectCommand="SELECT [ProductID], [ProductName], [UnitPrice], [CategoryID], [UnitsOnOrder] FROM [Products]">

</asp:SqlDataSource>

</form>

</body>

</html>