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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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