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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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