Wpf 删除EntityFramework CodeFirst中的自引用实体
我在wpf中为我的EF定义了以下类,以便在mvvm模式中使用:Wpf 删除EntityFramework CodeFirst中的自引用实体,wpf,entity-framework,mvvm-light,Wpf,Entity Framework,Mvvm Light,我在wpf中为我的EF定义了以下类,以便在mvvm模式中使用: public class ProductGroup : ViewModelBase { public long ID { get; set; } private string _Title; public string Title { get { return _Title; } set { if (_Title != val
public class ProductGroup : ViewModelBase
{
public long ID { get; set; }
private string _Title;
public string Title
{
get { return _Title; }
set
{
if (_Title != value)
{
_Title = value;
this.RaisePropertyChanged("Title");
}
}
}
private byte[] _Icon;
public byte[] Icon
{
get { return _Icon; }
set
{
if (_Icon != value)
{
_Icon = value;
this.RaisePropertyChanged("Icon");
}
}
}
private ProductGroup _Parent;
public ProductGroup Parent
{
get { return _Parent; }
set
{
if (_Parent != value)
{
_Parent = value;
this.RaisePropertyChanged("Parent");
}
}
}
private ObservableCollection<ProductGroup> _Childs;
public ObservableCollection<ProductGroup> Childs
{
get { return _Childs; }
set
{
if (_Childs != value)
{
_Childs = value;
this.RaisePropertyChanged("Childs");
}
}
}
private ObservableCollection<Product> _Products;
public ObservableCollection<Product> Products
{
get { return _Products; }
set
{
if (_Products != value)
{
_Products = value;
this.RaisePropertyChanged("Products");
}
}
}
}
- 我的定义正确吗
- 当我要从ProductGroups中删除项目时,会发生以下错误:
- 目标ProductGroup是另一ProductGroup的子级
- 目标ProductGroup没有子项和产品
public class Product : ViewModelBase
{
public long ID { get; set; }
private ProductGroup _Gorup;
public ProductGroup Gorup
{
get { return _Gorup; }
set
{
if (_Gorup != value)
{
_Gorup = value;
this.RaisePropertyChanged("Gorup");
}
}
}
private string _Name;
public string Name
{
get { return _Name; }
set
{
if (_Name != value)
{
_Name = value;
this.RaisePropertyChanged("Name");
}
}
}
}