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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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