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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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