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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


1 2 3 4 5 6 7 8 9 10 ... Item 1 to 1000 of 300000 Page: of 300 Page 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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