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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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