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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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