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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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