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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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