New to Telerik UI for ASP.NET AJAX? Download free 30-day trial

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...241 242 243 244 245 246 247 248 249 250 ... Item 248001 to 249000 of 300000 Page: of 300 GoPage size:

Sort Ascending
Sort Descending
Clear Sorting
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>

Support & Learning Resources

Find Assistance

Submit a support ticket if you have an active license or trial
Post in the forum if you don't have access to support

Virtualization

Related Resources

Support & Learning Resources

Find Assistance