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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...21 22 23 24 25 26 27 28 29 30 ... Item 24001 to 25000 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