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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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