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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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