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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


1 2 3 4 5 6 7 8 9 10 ... Item 1 to 1000 of 300000 Page: of 300 Page 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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