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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...51 52 53 54 55 56 57 58 59 60 ... Item 51001 to 52000 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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