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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


1 2 3 4 5 6 7 8 9 10 ... Item 3001 to 4000 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="vb" AutoEventWireup="false" CodeFile="DefaultVB.aspx.vb" Inherits="Telerik.GridExamplesVBNET.Performance.Virtualization.DefaultVB" %>

<%@ 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