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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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