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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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