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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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