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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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