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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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