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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...21 22 23 24 25 26 27 28 29 30 ... Item 23001 to 24000 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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