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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...31 32 33 34 35 36 37 38 39 40 ... Item 32001 to 33000 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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