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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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