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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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