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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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