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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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