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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...21 22 23 24 25 26 27 28 29 30 ... Item 20001 to 21000 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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