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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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