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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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