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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


1 2 3 4 5 6 7 8 9 10 ... Item 8001 to 9000 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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