XAF中实现树形属性或树形编辑

 1.在列表编辑器中

2.在属性编辑器中

3.实现代码如下

using System;
using System.ComponentModel;

using DevExpress.Xpo;
using DevExpress.Data.Filtering;

using DevExpress.ExpressApp;
using DevExpress.Persistent.Base;
using DevExpress.Persistent.BaseImpl;
using DevExpress.Persistent.Validation;

namespace XSolution1.Module
{
   [DefaultClassOptions]
    public class Employee : BaseObject
    {
        public Employee(Session session) : base(session) { }

        private string _Name;
        public string Name
        {
            get
            {
                return _Name;
            }
            set
            {
                SetPropertyValue("Name", ref _Name, value);
            }
        }

        private string _Note;
        public string Note
        {
            get
            {
                return _Note;
            }
            set
            {
                SetPropertyValue("Note", ref _Note, value);
            }
        }

        private Department _Department;
        public Department Department
        {
            get
            {
                return _Department;
            }
            set
            {
                SetPropertyValue("Department", ref _Department, value);
            }
        }
    }

}

using System;
using System.ComponentModel;
using DevExpress.Xpo;
using DevExpress.ExpressApp;
using DevExpress.Persistent.Base;
using DevExpress.Persistent.BaseImpl;
using DevExpress.Persistent.Validation;
using DevExpress.ExpressApp.Localization;
using DevExpress.Persistent.Base.General;
namespace XSolution1.Module
{ 
    [DefaultClassOptions]   
    public class Department : BaseObject, IHCategory
    { 
        private string name; 
        private Department parent; 
        private void CheckCircularReferences(Department obj) 
        { Department currentObj = obj; while (currentObj != null) 
        {
            if (currentObj == this) { throw new UserFriendlyException(ExceptionId.CircularReference);
            } currentObj = currentObj.Parent; } } 
        public Department(Session session) : base(session) { } 
        public Department(Session session, string name) : this(session) { this.name = name; } 
        [Association("DepartmentParent-DepartmentChild")]        
        public XPCollection<Department> Children 
        {
            get { return GetCollection<Department>("Children"); }
        } 
        [Persistent, Association("DepartmentParent-DepartmentChild")]        
        public Department Parent 
        { 
            get { return parent; } 
            set {
                  if (!IsLoading) 
                  { 
                      CheckCircularReferences(value);
                  }
                parent = value; OnChanged("Parent");
            }
        } 
        public string Name 
        { 
            get { return name; }
            set { name = value; OnChanged("Name"); } 
        } 
        IBindingList ITreeNode.Children 
        {
            get { return Children as IBindingList; }
        } 
        ITreeNode IHCategory.Parent 
        { 
            get { return Parent as IHCategory; } 
            set { Parent = value as Department; }
        }
        ITreeNode ITreeNode.Parent 
        { 
            get { return Parent as ITreeNode; }
        }
    }
}