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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...101 102 103 104 105 106 107 108 109 110 ... Item 101001 to 102000 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