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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


1 2 3 4 5 6 7 8 9 10 ... Item 7001 to 8000 of 300000 Page: of 300 GoPage 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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