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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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