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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


1 2 3 4 5 6 7 8 9 10 ... Item 9001 to 10000 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