WPF RibbonButton-Collection of common programming errors
RibbonButtons from the RibbonControlsLibrary behave differently than standard WPF buttons and need a command to display text. The command is where you also assign the images and other items such as tool tips.
var cmd = new RibbonCommand();
cmd.LabelTitle = "Browse";
cmd.CanExecute += ( sender, args ) => args.CanExecute = true;
cmd.Executed +=new ExecutedRoutedEventHandler(cmd_Executed);
var btn = new RibbonButton();
btn.Command = cmd;
MyRibbonGroup.Controls.Add( btn );
You must assign true to CanExecute, otherwise will the command/button will always be disabled. The CanExecute method can have your business logic disable or enable the command/button as well.