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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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