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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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