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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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

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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>

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