XAF点滴：很具体很用实用---处理三个小问题

    public class PrintReportController : PrintSelectionBaseController
    {
        protected override void UpdateActionState()
        {
            if (View is DetailView)
            {
                //详细视图下，都是可用的
            }
            else
            {
                base.UpdateActionState(); //如果不是detailview时，还按原来的逻辑走
            }

        }

        protected override void ShowInReport(SingleChoiceActionExecuteEventArgs e, string reportContainerHandle)
        {
            var dv = View as DetailView;
            if (dv != null && dv.ViewEditMode == DevExpress.ExpressApp.Editors.ViewEditMode.Edit)
            {
                this.ObjectSpace.CommitChanges();
            }//执行按钮前，先保存一下数据
            base.ShowInReport(e, reportContainerHandle);
        }
    }

    public partial class CloseDetailViewController : ViewController<DetailView>
    {
        public CloseDetailViewController()
        {
            InitializeComponent();
            this.CloseViewModeDetail.Execute += CloseViewModeDetail_Execute;
            // Target required Views (via the TargetXXX properties) and create their Actions.
        }

        private void CloseViewModeDetail_Execute(object sender, SimpleActionExecuteEventArgs e)
        {
            this.View.Close();
        }

        protected override void OnActivated()
        {
            base.OnActivated();
            this.CloseViewModeDetail.Active["InViewMode"] = View.ViewEditMode == ViewEditMode.View; //这个按钮只有在查看状态中显示
            // Perform various tasks depending on the target View.
        }
        protected override void OnViewControlsCreated()
        {
            base.OnViewControlsCreated();
            // Access and customize the target View control.
        }
        protected override void OnDeactivated()
        {
            // Unsubscribe from previously subscribed events and release other references and resources.
            base.OnDeactivated();
        }
    }

//按钮是这样设置的：
            this.CloseViewModeDetail.Caption = "返回";
            this.CloseViewModeDetail.Category = "Export";
            this.CloseViewModeDetail.Id = "CloseViewModeDetail";

 public partial class DetailItemViewController : ViewController<DetailView>
    {
        public DetailItemViewController()
        {
            InitializeComponent();
        }
        protected override void OnActivated()
        {
            base.OnActivated();
            var os = this.ObjectSpace as XPNestedObjectSpace; //如果有上级详细视图并且是在编辑状态的视图，那把本级别的编辑视图也设置成编辑状态。
            if (os!=null)
            {
                var dv = os.ParentObjectSpace.Owner as DetailView;
                if (dv!=null)
                {
                    this.View.ViewEditMode = dv.ViewEditMode;
                }
            }
            // Perform various tasks depending on the target View.
        }
        protected override void OnViewControlsCreated()
        {
            base.OnViewControlsCreated();
            // Access and customize the target View control.
        }
        protected override void OnDeactivated()
        {
            // Unsubscribe from previously subscribed events and release other references and resources.
            base.OnDeactivated();
        }
    }