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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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