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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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