如何使用WCF Ria Services跟踪实体更改？
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我需要将对客户端发生的对实体所做的更改记录到数据库表中。但是，当我进行更改并检查ChangeTracker属性时，它声称没有发生更改。
[服务]
private static readonly ISomeDao someDao = DataAccess.SomeDao;
[Query]
public List<SomeEntity> GetSomeEntites(int someId)
{
var entities = someDao.GetSomeEntites(someId);
entities.ForEach(e => e.StartTracking());
return entities;
}
[Update]
public void UpdateSomeEntity(SomeEntity entity)
{
// inspect entity.ChangeTracker.OriginalValues.... nothing
entity.StopTracking();
// inspect entity.ChangeTracker.OriginalValues.... nothing
...
// Update log table
}
public EntitySet<SomeEntity> SomeEntities
{
get { return _someEntity; }
set
{
if (_someEntity!= value)
{
_someEntity= value;
OnPropertyChanged(\"SomeEntities\");
}
}
}
没有找到相关结果
已邀请:
1 个回复
念炯
[OnDeserialized] public void OnDeserializedMethod(StreamingContext context) { IsDeserializing = false; ChangeTracker.ChangeTrackingEnabled = true; }[DataMember] public string Plaats { get { return _plaats; } set { if (_plaats != value) { _plaats = value; OnPropertyChanged(\"Plaats\"); } } } private string _plaats; [DataMember] public int LandID { get { return _landID; } set { if (_landID != value) { ChangeTracker.RecordOriginalValue(\"LandID\", _landID); if (!IsDeserializing) { if (Land != null && Land.ID != value) { Land = null; } } _landID = value; OnPropertyChanged(\"LandID\"); } } } private int _landID;