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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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