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