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


1 2 3 4 5 6 7 8 9 10 ... Item 4001 to 5000 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