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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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