实现菜单选择项执行Action

Add an Action with Option Selection

using DevExpress.ExpressApp.Utils;
using DevExpress.Persistent.Base.General;
using MySolution.Module.BusinessObjects;
//...
public partial class TaskActionsController : ViewController {
   private ChoiceActionItem setPriorityItem;
   private ChoiceActionItem setStatusItem;
   public TaskActionsController() {
      InitializeComponent();
      RegisterActions(components);
      SetTaskAction.Items.Clear();
      setPriorityItem = 
         new ChoiceActionItem(CaptionHelper.GetMemberCaption(typeof(DemoTask), "Priority"), null);
      SetTaskAction.Items.Add(setPriorityItem);
      FillItemWithEnumValues(setPriorityItem, typeof(Priority));
      setStatusItem = 
         new ChoiceActionItem(CaptionHelper.GetMemberCaption(typeof(DemoTask), "Status"), null);
      SetTaskAction.Items.Add(setStatusItem);
      FillItemWithEnumValues(setStatusItem, typeof(TaskStatus));
   }
   private void FillItemWithEnumValues(ChoiceActionItem parentItem, Type enumType) {
      foreach(object current in Enum.GetValues(enumType)) {
         EnumDescriptor ed = new EnumDescriptor(enumType);
         ChoiceActionItem item = new ChoiceActionItem(ed.GetCaption(current), current);
         item.ImageName = ImageLoader.Instance.GetEnumValueImageName(current);
         parentItem.Items.Add(item);
      }
   }
}

public enum Priority {
    [ImageName("State_Priority_Low")]
    Low = 0,
    [ImageName("State_Priority_Normal")]
    Normal = 1,
    [ImageName("State_Priority_High")]
    High = 2
}

using DevExpress.ExpressApp.Editors;
using System.Collections;
using MySolution.Module.BusinessObjects;
//...
private void SetTaskAction_Execute(object sender, SingleChoiceActionExecuteEventArgs e) {
    IObjectSpace objectSpace = View is ListView ? 
        Application.CreateObjectSpace() : View.ObjectSpace;
    ArrayList objectsToProcess = new ArrayList(e.SelectedObjects);
    if(e.SelectedChoiceActionItem.ParentItem == setPriorityItem) {
        foreach(Object obj in objectsToProcess) {
            DemoTask objInNewObjectSpace = (DemoTask)objectSpace.GetObject(obj);
            objInNewObjectSpace.Priority = (Priority)e.SelectedChoiceActionItem.Data;
        }
    }
    else
        if(e.SelectedChoiceActionItem.ParentItem == setStatusItem) {
            foreach(Object obj in objectsToProcess) {
                DemoTask objInNewObjectSpace = (DemoTask)objectSpace.GetObject(obj);
                objInNewObjectSpace.Status = (TaskStatus)e.SelectedChoiceActionItem.Data;
            }
        }
    if(View is DetailView && ((DetailView)View).ViewEditMode == ViewEditMode.View) {
        objectSpace.CommitChanges();
    }
    if(View is ListView) {
        objectSpace.CommitChanges();
        View.ObjectSpace.Refresh();
    }
}

using DevExpress.ExpressApp.Editors;
using System.Collections;
using MySolution.Module.BusinessObjects;
//...
private void SetTaskAction_Execute(object sender, SingleChoiceActionExecuteEventArgs e) {
    IObjectSpace objectSpace = View is ListView ? 
        Application.CreateObjectSpace() : View.ObjectSpace;
    ArrayList objectsToProcess = new ArrayList(e.SelectedObjects);
    if(e.SelectedChoiceActionItem.ParentItem == setPriorityItem) {
        foreach(Object obj in objectsToProcess) {
            DemoTask objInNewObjectSpace = (DemoTask)objectSpace.GetObject(obj);
            objInNewObjectSpace.Priority = (Priority)e.SelectedChoiceActionItem.Data;
        }
    }
    else
        if(e.SelectedChoiceActionItem.ParentItem == setStatusItem) {
            foreach(Object obj in objectsToProcess) {
                DemoTask objInNewObjectSpace = (DemoTask)objectSpace.GetObject(obj);
                objInNewObjectSpace.Status = (TaskStatus)e.SelectedChoiceActionItem.Data;
            }
        }
    if(View is DetailView && ((DetailView)View).ViewEditMode == ViewEditMode.View) {
        objectSpace.CommitChanges();
    }
    if(View is ListView) {
        objectSpace.CommitChanges();
        View.ObjectSpace.Refresh();
    }
}