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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


1 2 3 4 5 6 7 8 9 10 ... Item 2001 to 3000 of 300000 Page: of 300 GoPage 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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