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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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