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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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