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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...21 22 23 24 25 26 27 28 29 30 ... Item 20001 to 21000 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