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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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