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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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