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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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