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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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