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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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