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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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