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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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