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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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