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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...11 12 13 14 15 16 17 18 19 20 ... Item 17001 to 18000 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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