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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...71 72 73 74 75 76 77 78 79 80 ... Item 72001 to 73000 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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