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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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