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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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