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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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