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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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