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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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