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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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