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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...21 22 23 24 25 26 27 28 29 30 ... Item 21001 to 22000 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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