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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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