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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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