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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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