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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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