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

Virtualization

ID	Contact Title	Contact Name	Country	Rating


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


...201 202 203 204 205 206 207 208 209 210 ... Item 206001 to 207000 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