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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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