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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...51 52 53 54 55 56 57 58 59 60 ... Item 56001 to 57000 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