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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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