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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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