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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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