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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...11 12 13 14 15 16 17 18 19 20 ... Item 11001 to 12000 of 300000 Page: of 300 GoPage 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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