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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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