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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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