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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...41 42 43 44 45 46 47 48 49 50 ... Item 42001 to 43000 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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