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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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