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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


1 2 3 4 5 6 7 8 9 10 ... Item 1 to 1000 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