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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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