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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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