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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...71 72 73 74 75 76 77 78 79 80 ... Item 77001 to 78000 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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