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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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