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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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