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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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