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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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

<%@ 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