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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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