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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


1 2 3 4 5 6 7 8 9 10 ... Item 6001 to 7000 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