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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


1 2 3 4 5 6 7 8 9 10 ... Item 1001 to 2000 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