BlueSky.Commands.File.FileCloseCommand.CloseDataset C# (CSharp) Метод

        public void CloseDataset(bool confirm = true)
        {
            IUnityContainer container = LifetimeService.Instance.Container;
            IDataService service = container.Resolve<IDataService>();
            IUIController controller = container.Resolve<IUIController>();

            //Get current filetype from loaded dataset. This is file extension and Filter
            DataSource actds = controller.GetActiveDocument();//06Nov2012
            if (actds == null)
                return;
            string datasetName = "" + actds.Name;//uadatasets$lst$
            //Also try to get the filename of currently loaded file. This is FileName.
            string extension = controller.GetActiveDocument().Extension;
            string filename = controller.GetActiveDocument().FileName;
            bool cancel = false;
            if (confirm) //confirm from use about closing and about saving the modified dataset
            {
                if (System.Windows.MessageBox.Show("Do you want to close " + filename + " Dataset?",
                  "Do you want to close Dataset?", MessageBoxButton.YesNo) == MessageBoxResult.No)
                {
                    // Dont Close the window
                    return;
                }


                if (controller.GetActiveDocument().Changed)//Changes has been done. Do you want to save or Discard
                {
                    DialogResult result = System.Windows.Forms.MessageBox.Show("Do you want to save changes?",
                                                            "Save Changes?",
                                                             MessageBoxButtons.YesNoCancel,
                                                             MessageBoxIcon.Question);
                    if (result == DialogResult.Yes)//save
                    {
                        //If filetype=SPSS then save in RDATA format
                        //For other filetypes data grid can be saved but not the variable grid.
                        // For saving data grid and var grid only save in RDATA format
                        if (extension.Trim().Length < 1 || extension.Equals("sav")) //if no extension or if sav file. no extension in case of new dataset created.
                        {
                            Microsoft.Win32.SaveFileDialog saveasFileDialog = new Microsoft.Win32.SaveFileDialog();
                            saveasFileDialog.Filter = "R Obj (*.RData)|*.RData";
                            bool? output = saveasFileDialog.ShowDialog(System.Windows.Application.Current.MainWindow);
                            if (output.HasValue && output.Value)
                            {
                                service.SaveAs(saveasFileDialog.FileName, controller.GetActiveDocument());// #0
                            }
                        }
                        else
                        {
                            service.SaveAs(filename, controller.GetActiveDocument());// #0
                        }

                    }
                    else if (result == DialogResult.No)//Dont save
                    {

                        //Do nothing
                    }
                    else // Dont close the dataset/tab
                    {
                        cancel = true;
                    }


                }
            }
            if (!cancel)
            {
                service.Close(controller.GetActiveDocument());
                controller.closeTab();
                //container.Dispose();//added to cleanup.

            }
        }

        protected override void OnExecute(object param)
        {
            BSkyMouseBusyHandler.ShowMouseBusy();//ShowProgressbar_old();
            IUnityContainer container  = LifetimeService.Instance.Container;
            IDataService    service    = container.Resolve <IDataService>();
            IUIController   controller = container.Resolve <IUIController>();


            //Get current filetype from loaded dataset. This is file extension and Filter
            DataSource actds = controller.GetActiveDocument();//06Nov2012

            if (actds == null)
            {
                return;
            }
            string datasetName = "" + actds.Name;//uadatasets$lst$
            //string datasetName = "uadatasets$lst$" + controller.GetActiveDocument().Name;
            //Also try to get the filename of currently loaded file. This is FileName.
            string extension = controller.GetActiveDocument().Extension;
            string filename  = controller.GetActiveDocument().FileName;


            SaveFileDialog saveasFileDialog = new SaveFileDialog();

            saveasFileDialog.Filter = FileNameFilter;
            //CheckBox cbox = new CheckBox();

            //saveasFileDialog.FileName = filename;//////
            Window1 appwin = LifetimeService.Instance.Container.Resolve <Window1>();
            bool?   output = saveasFileDialog.ShowDialog(appwin);//Application.Current.MainWindow);

            if (output.HasValue && output.Value)
            {
                service.SaveAs(saveasFileDialog.FileName, controller.GetActiveDocument()); // #0
                controller.GetActiveDocument().Changed = false;                            //21Mar2014 during close it should not prompt again for saving

                if (saveasFileDialog.FileName.ToLower().EndsWith("sav"))                   //12Feb2018 we dont want to open SaveAs-ed SAV files.
                {
                    MessageBox.Show(BSky.GlobalResources.Properties.Resources.SaveAsSucces + saveasFileDialog.FileName, BSky.GlobalResources.Properties.Resources.Saved, MessageBoxButton.OK, MessageBoxImage.Asterisk);
                }
                else if (System.IO.File.Exists(saveasFileDialog.FileName))
                {
                    //Close current Dataset on whic Save As was run
                    FileCloseCommand fcc = new FileCloseCommand();
                    fcc.CloseDataset(false);

                    //Open Dataset that was SaveAs-ed.
                    FileOpenCommand fo = new FileOpenCommand();
                    fo.FileOpen(saveasFileDialog.FileName, true);
                }
                else
                {
                    BSkyMouseBusyHandler.HideMouseBusy();//HideProgressbar_old();
                    MessageBox.Show(BSky.GlobalResources.Properties.Resources.SaveAsFailed + saveasFileDialog.FileName, BSky.GlobalResources.Properties.Resources.InternalError, MessageBoxButton.OK, MessageBoxImage.Asterisk);
                }
            }
            BSkyMouseBusyHandler.HideMouseBusy();//HideProgressbar_old();
        }