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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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