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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...21 22 23 24 25 26 27 28 29 30 ... Item 20001 to 21000 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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