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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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