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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


1 2 3 4 5 6 7 8 9 10 ... Item 4001 to 5000 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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