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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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