public void Handle(SavePicture notification)
{
if (!notification.HasImage())
{
throw new InvalidOperationException("No Image was uploaded.");
}
StudentPicture studentPicture = _dbContext.StudentPictures
.Where(e => e.StudentId.Equals(_currentUser.User.Id))
.SingleOrDefault(e => e.ImageType == notification.Type) ??
new StudentPicture {
ImageType = notification.Type
};
studentPicture.StudentId = _currentUser.User.Id;
studentPicture.DateSubmitted = DateTime.Now;
studentPicture.ImageName = notification.FileName;
studentPicture.ImageData = notification.ImageData;
studentPicture.MimeType = notification.MimeType;
if (studentPicture.Id == default(int))
{
_dbContext.StudentPictures.Add(studentPicture);
}
else
{
ObjectStateManager objectStateManager =
((IObjectContextAdapter)_dbContext).ObjectContext.ObjectStateManager;
_dbContext.StudentPictures.Attach(studentPicture);
objectStateManager.ChangeObjectState(studentPicture, EntityState.Modified);
}
_dbContext.SaveChanges();
}
/// <summary>
/// откатывам все изменения в контексте,
/// </summary>
public void Rollback()
{
ServerAction = true;
//detaching all added entities
var addedEntities = ObjectStateManager.GetObjectStateEntries(EntityState.Added);
foreach (var objectStateEntry in addedEntities)
{
Detach(objectStateEntry.Entity);
}
var deletedEntities = ObjectStateManager.GetObjectStateEntries(EntityState.Deleted);
//apply origin value for all modified entities
foreach (var objectStateEntry in deletedEntities)
{
if (objectStateEntry.Entity != null)
{
ObjectStateManager.ChangeObjectState(objectStateEntry.Entity, EntityState.Modified);
}
}
//apply origin value for all modified entities
var modifiedEntities = ObjectStateManager.GetObjectStateEntries(EntityState.Modified);
foreach (var objectStateEntry in modifiedEntities)
{
RevertEntityScalars((EntityObject)objectStateEntry.Entity);
}
//set state for every changed entities in unchanged
AcceptAllChanges();
ServerAction = false;
}
public void Handle(SaveExpression notification)
{
StudentExpression studentExpression = _dbContext.StudentExpressions
.Where(e => e.StudentId.Equals(notification.StudentId))
.SingleOrDefault(e => e.Type == notification.Type) ??
new StudentExpression {
Type = notification.Type
};
studentExpression.StudentId = notification.StudentId;
studentExpression.Text = notification.Text;
if (studentExpression.Id == default(int))
{
_dbContext.StudentExpressions.Add(studentExpression);
}
else
{
ObjectStateManager objectStateManager =
((IObjectContextAdapter)_dbContext).ObjectContext.ObjectStateManager;
_dbContext.StudentExpressions.Attach(studentExpression);
objectStateManager.ChangeObjectState(studentExpression, EntityState.Modified);
}
_dbContext.SaveChanges();
}
public override void OnBeforeUpdate(DbContext dbContext, ObjectStateManager manager, IVersion item)
{
if (item.VersionNo == 0)
{
throw new Exception("Unexpected , version number should not be zero while update.");
}
base.OnBeforeUpdate(dbContext, manager, item);
item.VersionNo = item.VersionNo + 1;
manager.ChangeObjectState(item, EntityState.Added);
}
public override void OnBeforeDelete(DbContext dbContext, ObjectStateManager manager, ISoftDelete item)
{
if (item.IsDeleted)
{
throw new InvalidOperationException("Item is already deleted.");
}
base.OnBeforeDelete(dbContext, manager, item);
dbContext.Entry(item).Reload();
item.IsDeleted = true;
manager.ChangeObjectState(item, EntityState.Modified);
}
public void Handle(SaveGradInfo notification)
{
GraduateInformation information = _dbContext.GraduateInformation
.SingleOrDefault(i => i.StudentId == _currentUser.User.Id)
?? new GraduateInformation {
StudentId = _currentUser.User.Id
};
information.Name = notification.Name;
information.Street = notification.Street;
information.City = notification.City;
information.StudentEmail = notification.StudentEmail;
information.ParentEmail = notification.ParentEmail;
information.FineArts = notification.FineArts;
information.AcademicClasses = notification.AcademicClasses;
information.WillParticipateInGraduation = notification.WillParticipateInGraduation;
information.TakenKeysWorldView = notification.TakenKeysWorldView;
information.TakenApprovedWorldView = notification.TakenApprovedWorldView;
information.WillSecureAnnouncements = notification.WillSecureAnnouncements;
information.NeedCapAndGown = notification.NeedCapAndGown;
information.Height = notification.Height;
if (information.Id == default(int))
{
_dbContext.GraduateInformation.Add(information);
}
else
{
ObjectStateManager objectStateManager =
((IObjectContextAdapter)_dbContext).ObjectContext.ObjectStateManager;
_dbContext.GraduateInformation.Attach(information);
objectStateManager.ChangeObjectState(information, EntityState.Modified);
}
_dbContext.SaveChanges();
}
public void ChangeState <T>(ObjectState state, T entity) where T : class
{
ObjectStateManager.ChangeObjectState(entity, StateHelpers.GetEquivalentEntityState(state));
}
public void ChangeObjectState(Object entity, EntityState entityState)
{
ObjectStateManager.ChangeObjectState(entity, entityState);
}
private static void ChangeStateOfEntity(ObjectStateManager objectStateManager, EntityWithId entity)
{
// TODO: Check for changs or deleted before moving this to Added/Modified
objectStateManager.ChangeObjectState(entity, entity.Id == 0 ? EntityState.Added : EntityState.Modified);
}
public void SetModified(object entity)
{
ObjectStateManager.ChangeObjectState(entity, EntityState.Modified);
}
