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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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