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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


1 2 3 4 5 6 7 8 9 10 ... Item 1 to 1000 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="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