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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...21 22 23 24 25 26 27 28 29 30 ... Item 20001 to 21000 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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