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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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

<%@ 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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