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Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...31 32 33 34 35 36 37 38 39 40 ... Item 33001 to 34000 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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