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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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