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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...91 92 93 94 95 96 97 98 99 100 ... Item 98001 to 99000 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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