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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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