- 当我绑定另一个实体的名称时,我的WPF (netcore3.1-windows) EFCore 5应用程序中没有初始数据。
- 数据最初在同一个应用程序中加载,但使用WPF (net40) EFCore 6应用程序从页面加载:
public partial class Entity
{
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2214:DoNotCallOverridableMethodsInConstructors")]
public virtual AnotherEntity AnotherEntity { get; set; }
...
}
...
WPFPage()
{
_entities = DBContext.Entities.ToList();
}
<ListView ItemsSource="{Binding _entities}" ...> ...
<GridView>
<!--with FECore5 no data here. But in EF6 there is.-->
<GridViewColumn DisplayMemberBinding="{Binding Entity.AnotherEntityName}"
Header="Entity"
Width="100"></GridViewColumn>
</GridView>
...
除非我访问和加载另一个数据库实体从AnotherEntities属性在应用程序代码:
public AnotherWPFPage() { _anotherEntities = DBContext.AnotherEntities.ToList(); }
或者我显式地将绑定设置为
<GridViewColumn DisplayMemberBinding="{Binding Entity.AnotherEntity.AnotherEntityName}"
这是由于数据库的脚手架错误由Fluent Api, xaml绑定功能或EntityFrameworkCore的功能?
我没有访问您的完整代码库,但我认为这是由于EF Core延迟加载特性及其动态代理可能无法与WPF绑定一起工作。在你的代码中修改
_entities = DBContext.Entities.ToList();
_entities = DBContext.Entities
.Include(x => x.AnotherEntity)
.ToList();