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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...31 32 33 34 35 36 37 38 39 40 ... Item 37001 to 38000 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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