The C1Accordion control allows you to open the multiple panes at once.

When the RequireOpenedPane property is set to True, clicking a header will close the currently opened pane, leaving the remaining panes closed. When the RequireOpenedPane property is set to False, clicking a header will not close the currently opened panes.

Design Time

1. Select View | Properties Window.
2. Next to the RequireOpenedPane property, click the drop-down arrow and choose False.

In Code

Add the following code to the Page_Load event, for example, to set theEvent property.

To Write code in Visual Basic

To write code in C#

In Markup

You can add the markup for theEvent property directly to the C1Accordion markup. It is automatically added to the markup if you set the property in the page at design time. The markup looks like the following:

<cc1:C1Accordion ID="C1Accordion1" runat="server" 
DataSourceID="AccessDataSource1" Event="" RequireOpenedPane="False">

When you run the application and hover over an accordion header, the content pane expands.