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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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