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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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