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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...91 92 93 94 95 96 97 98 99 100 ... Item 94001 to 95000 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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