New to Telerik UI for ASP.NET AJAX? Download free 30-day trial

Virtualization

ID	Contact Title	Contact Name	Country	Rating


1	Accounting Manager	Georg Pipps	Brazil	1 2 3 4 5
2	Sales Agent	Matti Karttunen	England	1 2 3 4 5
3	Sales Associate	Howard Snyder	France	1 2 3 4 5
4	Sales Associate	Elizabeth Lincoln	France	1 2 3 4 5
5	Marketing Assistant	Georg Pipps	Brazil	1 2 3 4 5
6	Sales Manager	Georg Pipps	France	1 2 3 4 5
7	Sales Consultant	Elizabeth Lincoln	USA	1 2 3 4 5
8	Sales Consultant	Patricio Simpson	England	1 2 3 4 5
9	Marketing Assistant	Georg Pipps	England	1 2 3 4 5
10	Sales Consultant	Antonio Moreno	Italy	1 2 3 4 5
11	Accountant	Patricio Simpson	Italy	1 2 3 4 5
12	Marketing Assistant	Elizabeth Lincoln	Austria	1 2 3 4 5
13	Accountant	Matti Karttunen	Brazil	1 2 3 4 5
14	Marketing Assistant	Pascale Cartrain	Brazil	1 2 3 4 5
15	Owner	Hanna Moos	France	1 2 3 4 5
16	Marketing Manager	Pascale Cartrain	Spain	1 2 3 4 5
17	Sales Consultant	Pascale Cartrain	Argentina	1 2 3 4 5
18	Sales Manager	Paul Henriot	USA	1 2 3 4 5
19	Accountant	Howard Snyder	Argentina	1 2 3 4 5
20	Sales Consultant	Elizabeth Lincoln	Austria	1 2 3 4 5
21	Sales Associate	Hanna Moos	Brazil	1 2 3 4 5
22	Sales Manager	Matti Karttunen	Brazil	1 2 3 4 5
23	Sales Consultant	Jaime Yorres	Italy	1 2 3 4 5
24	Accounting Manager	Georg Pipps	Austria	1 2 3 4 5
25	Marketing Assistant	Pascale Cartrain	England	1 2 3 4 5
26	Sales Consultant	Pascale Cartrain	Brazil	1 2 3 4 5
27	Sales Associate	Paul Henriot	France	1 2 3 4 5
28	Accounting Manager	Jaime Yorres	USA	1 2 3 4 5
29	Sales Associate	Hanna Moos	Bulgaria	1 2 3 4 5
30	Sales Consultant	Howard Snyder	Bulgaria	1 2 3 4 5
31	Owner	Matti Karttunen	Spain	1 2 3 4 5
32	Marketing Assistant	Hanna Moos	Argentina	1 2 3 4 5
33	Marketing Assistant	Pascale Cartrain	Germany	1 2 3 4 5
34	Marketing Assistant	Antonio Moreno	France	1 2 3 4 5
35	Sales Manager	Patricio Simpson	France	1 2 3 4 5
36	Marketing Assistant	Pascale Cartrain	Brazil	1 2 3 4 5
37	Sales Associate	Pascale Cartrain	Bulgaria	1 2 3 4 5
38	Accountant	Howard Snyder	England	1 2 3 4 5
39	Sales Manager	Hanna Moos	USA	1 2 3 4 5
40	Sales Consultant	Hanna Moos	Brazil	1 2 3 4 5
41	Accounting Manager	Antonio Moreno	Austria	1 2 3 4 5
42	Sales Representative	Matti Karttunen	Spain	1 2 3 4 5
43	Owner	Patricio Simpson	England	1 2 3 4 5
44	Owner	Jaime Yorres	Italy	1 2 3 4 5
45	Sales Agent	Howard Snyder	Germany	1 2 3 4 5
46	Accountant	Patricio Simpson	Brazil	1 2 3 4 5
47	Sales Manager	Patricio Simpson	France	1 2 3 4 5
48	Sales Associate	Paul Henriot	Italy	1 2 3 4 5
49	Sales Manager	Matti Karttunen	USA	1 2 3 4 5
50	Accounting Manager	Pascale Cartrain	Italy	1 2 3 4 5
51	Marketing Assistant	Patricio Simpson	England	1 2 3 4 5
52	Sales Representative	Paul Henriot	Bulgaria	1 2 3 4 5
53	Marketing Manager	Patricio Simpson	USA	1 2 3 4 5
54	Marketing Assistant	Elizabeth Lincoln	USA	1 2 3 4 5
55	Sales Associate	Howard Snyder	Argentina	1 2 3 4 5
56	Sales Associate	Antonio Moreno	Italy	1 2 3 4 5
57	Owner	Paul Henriot	Brazil	1 2 3 4 5
58	Accountant	Pascale Cartrain	England	1 2 3 4 5
59	Accounting Manager	Matti Karttunen	Brazil	1 2 3 4 5
60	Sales Agent	Patricio Simpson	USA	1 2 3 4 5
61	Sales Consultant	Hanna Moos	Germany	1 2 3 4 5
62	Sales Consultant	Patricio Simpson	Italy	1 2 3 4 5
63	Marketing Manager	Paul Henriot	Argentina	1 2 3 4 5
64	Accountant	Paul Henriot	Austria	1 2 3 4 5
65	Marketing Manager	Howard Snyder	England	1 2 3 4 5
66	Owner	Pascale Cartrain	USA	1 2 3 4 5
67	Sales Consultant	Howard Snyder	Germany	1 2 3 4 5
68	Marketing Manager	Pascale Cartrain	Spain	1 2 3 4 5
69	Accountant	Elizabeth Lincoln	France	1 2 3 4 5
70	Sales Associate	Pascale Cartrain	France	1 2 3 4 5
71	Sales Manager	Paul Henriot	Italy	1 2 3 4 5
72	Sales Consultant	Elizabeth Lincoln	Argentina	1 2 3 4 5
73	Sales Representative	Patricio Simpson	Germany	1 2 3 4 5
74	Sales Agent	Matti Karttunen	Argentina	1 2 3 4 5
75	Marketing Assistant	Matti Karttunen	Bulgaria	1 2 3 4 5
76	Sales Manager	Georg Pipps	USA	1 2 3 4 5
77	Accounting Manager	Antonio Moreno	Argentina	1 2 3 4 5
78	Sales Associate	Jaime Yorres	Austria	1 2 3 4 5
79	Sales Manager	Hanna Moos	Germany	1 2 3 4 5
80	Marketing Manager	Patricio Simpson	Germany	1 2 3 4 5
81	Sales Manager	Paul Henriot	England	1 2 3 4 5
82	Accounting Manager	Jaime Yorres	Spain	1 2 3 4 5
83	Accountant	Elizabeth Lincoln	Brazil	1 2 3 4 5
84	Accounting Manager	Paul Henriot	Spain	1 2 3 4 5
85	Sales Representative	Pascale Cartrain	USA	1 2 3 4 5
86	Sales Consultant	Georg Pipps	Bulgaria	1 2 3 4 5
87	Sales Associate	Pascale Cartrain	Argentina	1 2 3 4 5
88	Sales Consultant	Georg Pipps	Brazil	1 2 3 4 5
89	Owner	Matti Karttunen	Bulgaria	1 2 3 4 5
90	Marketing Manager	Jaime Yorres	Brazil	1 2 3 4 5
91	Sales Consultant	Matti Karttunen	Bulgaria	1 2 3 4 5
92	Sales Manager	Hanna Moos	Brazil	1 2 3 4 5
93	Accountant	Howard Snyder	England	1 2 3 4 5
94	Owner	Matti Karttunen	Spain	1 2 3 4 5
95	Sales Manager	Howard Snyder	England	1 2 3 4 5
96	Marketing Assistant	Hanna Moos	Italy	1 2 3 4 5
97	Marketing Manager	Elizabeth Lincoln	Austria	1 2 3 4 5
98	Sales Representative	Pascale Cartrain	France	1 2 3 4 5
99	Sales Manager	Howard Snyder	France	1 2 3 4 5
100	Sales Associate	Elizabeth Lincoln	Argentina	1 2 3 4 5


1 2 3 4 5 6 7 8 9 10 ... Item 2001 to 3000 of 300000 Page: of 300 GoPage size:

Sort Ascending
Sort Descending
Clear Sorting
Columns
- ID
- Contact Title
- Contact Name
- Country
- Rating

About this demo
C#
VB
Download demo code files
Isolate this demo as a stand-alone application

RadGrid's virtualization feature allows you to handle hundreds of thousands of rows without negatively impacting the user experience. The control achieves this thanks to its ItemsPerView property allowing you to control the number of items loaded at a time. Users can now scroll, as well as show, hide, resize and reorder columns without any waiting time.

This demo shows how quickly Telerik's ASP.NET DataGrid can handle user interactions with 300,000 items. You can configure the component to allow scrolling through the entire data set or only through the current page by using EnableCurrentPageScrollOnly property,.

<%@ Page Language="c#" CodeFile="DefaultCS.aspx.cs" Inherits="Telerik.GridExamplesCSharp.Performance.Virtualization.DefaultCS" %>

<%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>
<%@ Register TagPrefix="qsf" Namespace="Telerik.QuickStart" %>
<!DOCTYPE html>
<html xmlns='http://www.w3.org/1999/xhtml'>
<head runat="server">
    <title>Telerik ASP.NET Example</title>
    <link href="styles.css" rel="stylesheet" />
</head>
<body>
    <form id="form1" runat="server">
    <telerik:RadScriptManager runat="server" ID="RadScriptManager1" />
    <telerik:RadSkinManager ID="RadSkinManager1" runat="server" ShowChooser="true" />
    <telerik:RadAjaxLoadingPanel runat="server" ID="RadAjaxLoadingPanel1"></telerik:RadAjaxLoadingPanel>
    <telerik:RadAjaxPanel runat="server" ID="RadAjaxPanel" LoadingPanelID="RadAjaxLoadingPanel1" CssClass="demo-container">
        <telerik:RadGrid RenderMode="Lightweight" ID="RadGrid1" runat="server"  AutoGenerateColumns="false"
            AllowSorting="true" GroupingEnabled="false"
            EnableHeaderContextMenu="true" AllowPaging="true" PageSize="1000" OnNeedDataSource="RadGrid1_NeedDataSource">
            <MasterTableView TableLayout="Fixed">
                <Columns>
                    <telerik:GridBoundColumn UniqueName="ID" HeaderText="ID" HeaderStyle-Width="50px" DataField="ID"></telerik:GridBoundColumn>
                    <telerik:GridBoundColumn UniqueName="ContactTitle" HeaderText="Contact Title" HeaderStyle-Width="150px" DataField="ContactTitle"></telerik:GridBoundColumn>
                    <telerik:GridBoundColumn UniqueName="ContactName" HeaderText="Contact Name" HeaderStyle-Width="150" DataField="ContactName"></telerik:GridBoundColumn>
                    <telerik:GridBoundColumn UniqueName="Country" HeaderText="Country" HeaderStyle-Width="100px" DataField="Country"></telerik:GridBoundColumn>
                    <telerik:GridRatingColumn UniqueName="Rating" HeaderText="Rating" HeaderStyle-Width="100px" DataField="Rating"></telerik:GridRatingColumn>
                </Columns>
            </MasterTableView>
            <ClientSettings ReorderColumnsOnClient="true" AllowColumnsReorder="true" ColumnsReorderMethod="Reorder">
                <Virtualization EnableVirtualization="true" InitiallyCachedItemsCount="2000"
                    LoadingPanelID="RadAjaxLoadingPanel1" ItemsPerView="100"/>
                <Scrolling AllowScroll="true" UseStaticHeaders="true" ScrollHeight="500px" />
                <Resizing AllowColumnResize="true" />
            </ClientSettings>
            <PagerStyle Mode="NextPrevNumericAndAdvanced"></PagerStyle>
        </telerik:RadGrid>
    </telerik:RadAjaxPanel>
    </form>
</body>
</html>

Support & Learning Resources

Find Assistance

Submit a support ticket if you have an active license or trial
Post in the forum if you don't have access to support

Virtualization

Related Resources

Support & Learning Resources

Find Assistance