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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...91 92 93 94 95 96 97 98 99 100 ... Item 97001 to 98000 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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