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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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