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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...11 12 13 14 15 16 17 18 19 20 ... Item 11001 to 12000 of 300000 Page: of 300 GoPage 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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