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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


1 2 3 4 5 6 7 8 9 10 ... Item 1 to 1000 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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