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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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