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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


1 2 3 4 5 6 7 8 9 10 ... Item 1001 to 2000 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