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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...251 252 253 254 255 256 257 258 259 260 ... Item 253001 to 254000 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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