public virtual void InsertOrUpdate(IEnumerable <T> entities)
{
AppLogger.logDebug(this.ToString(), string.Format("Begin inserting or updating entities of {0}. Count: {1}.", typeof(T), entities.Count()));
try
{
foreach (T entity in entities)
{
AppLogger.logDebug(this.ToString(), "INSERT OR UPDATE", entity);
string id = entity.GetType().GetProperty("id").GetValue(entity, null).ToString();
var attachedEntity = EntitiesSet.AsEnumerable().FirstOrDefault(e => e.EntityKey.EntityKeyValues[0].Value.Equals(id));
if (attachedEntity != null)
{
EntitiesSet.Detach(attachedEntity);
EntitiesSet.Attach(entity);
var entry = Context.ObjectStateManager.GetObjectStateEntry(entity);
entry.ApplyOriginalValues(attachedEntity);
}
else
{
EntitiesSet.AddObject(entity);
}
}
AppLogger.logDebug(this.ToString(), string.Format("Entities of {0} inserted or updated successfully.", typeof(T)));
}
catch (Exception ex)
{
AppLogger.logError(this.ToString(), string.Format("Error occurs while inserting or updating entities of {0}.", typeof(T)), ex);
throw;
}
AppLogger.logDebug(this.ToString(), string.Format("Finish inserting or updating entities of {0}.", typeof(T)));
}
public virtual T Get(Func <T, bool> predicate)
{
T entity = null;
AppLogger.logDebug(this.ToString(), string.Format("Begin getting entity of {0}.", typeof(T)));
try
{
if (predicate != null)
{
entity = EntitiesSet.FirstOrDefault(predicate);
if (entity != null)
{
AppLogger.logDebug(this.ToString(), string.Format("Entity of {0} found.", typeof(T)));
AppLogger.logDebug(this.ToString(), "GET", entity);
EntitiesSet.Detach(entity);
}
else
{
AppLogger.logDebug(this.ToString(), string.Format("Entity of {0} not found.", typeof(T)));
}
}
}
catch (Exception ex)
{
AppLogger.logError(this.ToString(), ex);
throw;
}
AppLogger.logDebug(this.ToString(), string.Format("Finish getting entity of {0}.", typeof(T)));
return(entity);
}
public virtual void Update(T entity)
{
AppLogger.logDebug(this.ToString(), string.Format("Begin updating entity of {0}.", typeof(T)));
try
{
AppLogger.logDebug(this.ToString(), "UPDATE", entity);
if (entity.EntityState == EntityState.Detached)
{
var id = entity.GetType().GetProperty("id").GetValue(entity, null).ToString();
var attachedEntity = EntitiesSet.AsEnumerable().FirstOrDefault(e => e.EntityKey.EntityKeyValues[0].Value.Equals(id));
if (attachedEntity != null)
{
// HACK: Do the trick to detach the existed entity and attach the new entity, then apply the original values
// from the old entity to the new entity. This will set the new entity's state to "Modified" and the
// ObjectStateManager will track only different values.
EntitiesSet.Detach(attachedEntity);
EntitiesSet.Attach(entity);
var entry = Context.ObjectStateManager.GetObjectStateEntry(entity);
entry.ApplyOriginalValues(attachedEntity);
}
}
AppLogger.logDebug(this.ToString(), string.Format("Entity of {0} updated successfully.", typeof(T)));
}
catch (Exception ex)
{
AppLogger.logError(this.ToString(), string.Format("Error occurs while updating entity of {0}.", typeof(T)), ex);
throw;
}
AppLogger.logDebug(this.ToString(), string.Format("Finish updating entity of {0}.", typeof(T)));
}
