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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...21 22 23 24 25 26 27 28 29 30 ... Item 21001 to 22000 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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