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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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

Product Bundles

DevCraft

Web

Mobile

Document Management

Desktop

Reporting & Mocking

Automated Testing

CMS

UI/UX Tools

Debugging

Free Tools

Support and Learning

Productivity and Design Tools

Virtualization

Related Resources

Support & Learning Resources

Find Assistance