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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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