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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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