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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


1 2 3 4 5 6 7 8 9 10 ... Item 6001 to 7000 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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