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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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