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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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