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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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