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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...11 12 13 14 15 16 17 18 19 20 ... Item 18001 to 19000 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