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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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