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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...91 92 93 94 95 96 97 98 99 100 ... Item 97001 to 98000 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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