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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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