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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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