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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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