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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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