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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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