1.在列表编辑器中
2.在属性编辑器中
3.实现代码如下
代码 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.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);
}
}
}
}
代码 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 &＃61; obj; while (currentObj !&＃61; null)
{
if (currentObj &＃61;&＃61; this) { throw new UserFriendlyException(ExceptionId.CircularReference);
} currentObj &＃61; currentObj.Parent; } }
public Department(Session session) : base(session) { }
public Department(Session session, string name) : this(session) { this.name &＃61; 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 &＃61; value; OnChanged("Parent");
}
}
public string Name
{
get { return name; }
set { name &＃61; value; OnChanged("Name"); }
}
IBindingList ITreeNode.Children
{
get { return Children as IBindingList; }
}
ITreeNode IHCategory.Parent
{
get { return Parent as IHCategory; }
set { Parent &＃61; value as Department; }
}
ITreeNode ITreeNode.Parent
{
get { return Parent as ITreeNode; }
}
}
}
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 &＃61; obj; while (currentObj !&＃61; null)
{
if (currentObj &＃61;&＃61; this) { throw new UserFriendlyException(ExceptionId.CircularReference);
} currentObj &＃61; currentObj.Parent; } }
public Department(Session session) : base(session) { }
public Department(Session session, string name) : this(session) { this.name &＃61; 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 &＃61; value; OnChanged("Parent");
}
}
public string Name
{
get { return name; }
set { name &＃61; value; OnChanged("Name"); }
}
IBindingList ITreeNode.Children
{
get { return Children as IBindingList; }
}
ITreeNode IHCategory.Parent
{
get { return Parent as IHCategory; }
set { Parent &＃61; value as Department; }
}
ITreeNode ITreeNode.Parent
{
get { return Parent as ITreeNode; }
}
}
}
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