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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...11 12 13 14 15 16 17 18 19 20 ... Item 13001 to 14000 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