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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...11 12 13 14 15 16 17 18 19 20 ... Item 19001 to 20000 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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