Programmatically determine the display mode or edit mode of a website

You have a WCMS website and want to programmatically determine if the whole website is in display mode or edit mode. The namespace

using Microsoft.SharePoint.WebControls;

offers the SPControlMode enumeration with the members:

• Display
• Edit
• Invalid
• New

You can check the current mode by using the SPContext.Current object:
if (SPContext.Current.FormContext.FormMode == SPControlMode.Edit)
{
}

If you want implement a custom WebControl you can use Microsoft.SharePoint.WebControls.SPControlMode.Display to determine if your custom WebControl is in display or edit mode.