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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...21 22 23 24 25 26 27 28 29 30 ... Item 24001 to 25000 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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