Livetを使ったファイル保存ダイアログの実装例

livet-savedlg.cs

/* xaml
<Button Content="export" IsEnabled="{Binding ExportCommand.CanExecute}">
  <i:Interaction.Triggers>
    <i:EventTrigger EventName="Click">
      <l:SaveFileDialogInteractionMessageAction>
        <l:DirectInteractionMessage CallbackCommand="{Binding ExportCommand}">
          <l:SavingFileSelectionMessage Filter="{Binding ExportFilter}" />
        </l:DirectInteractionMessage>
      </l:SaveFileDialogInteractionMessageAction>
    </i:EventTrigger>
  </i:Interaction.Triggers>
</Button>
*/

/* view model */

public void Export(SavingFileSelectionMessage message) {
  string filename = (message.Response != null) ? message.Response[0] : null;
  if ( null != filename) {
    logger.Debug(filename);
    return;
  }
}

private ListenerCommand<SavingFileSelectionMessage> _ExportCommand;
public ListenerCommand<SavingFileSelectionMessage> ExportCommand {
  get {
    if (_ExportCommand == null) {
      _ExportCommand = new ListenerCommand<SavingFileSelectionMessage>(Export, CanExport);
    }
    return _ExportCommand;
  }
}
  
public bool CanExport() {
  return true;
}