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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...31 32 33 34 35 36 37 38 39 40 ... Item 32001 to 33000 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