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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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