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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


1 2 3 4 5 6 7 8 9 10 ... Item 1001 to 2000 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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