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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


1 2 3 4 5 6 7 8 9 10 ... Item 1 to 1000 of 300000 Page: of 300 Page 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