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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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