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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...11 12 13 14 15 16 17 18 19 20 ... Item 12001 to 13000 of 300000 Page: of 300 GoPage 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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