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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...71 72 73 74 75 76 77 78 79 80 ... Item 78001 to 79000 of 300000 Page: of 300 GoPage 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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