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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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