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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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