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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...21 22 23 24 25 26 27 28 29 30 ... Item 23001 to 24000 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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