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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...21 22 23 24 25 26 27 28 29 30 ... Item 21001 to 22000 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