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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...71 72 73 74 75 76 77 78 79 80 ... Item 71001 to 72000 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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