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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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