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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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