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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...11 12 13 14 15 16 17 18 19 20 ... Item 17001 to 18000 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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