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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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