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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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