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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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