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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...11 12 13 14 15 16 17 18 19 20 ... Item 16001 to 17000 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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