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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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