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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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