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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...121 122 123 124 125 126 127 128 129 130 ... Item 126001 to 127000 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