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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...291 292 293 294 295 296 297 298 299 300 Item 292001 to 293000 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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