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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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