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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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