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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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