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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...291 292 293 294 295 296 297 298 299 300 Item 291001 to 292000 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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