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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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

<%@ 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