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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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