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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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