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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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