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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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