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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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