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


...11 12 13 14 15 16 17 18 19 20 ... Item 16001 to 17000 of 300000 Page: of 300 GoPage 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