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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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