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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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