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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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