public Guid CreateInstance(int recordId, int requestedById)
{
//set properties
InstanceId = Guid.NewGuid();
RecordId = recordId;
IsCompleted = false;
setFirstState();
CurrentState = FirstState;
//wrap and save
using (WorkflowEntities db = new WorkflowEntities())
{
Instance ins = new Instance()
{
InstanceId = InstanceId,
WorkflowData = Wrap()
};
History hst = new History()
{
FromState = "",
InstanceId = ins.InstanceId,
ToState = FirstState.Name,
TransitionBy = requestedById,
TransitionDate = DateTime.Now
};
db.Entry(ins).State = EntityState.Added;
db.Entry(hst).State = EntityState.Added;
db.SaveChanges();
return ins.InstanceId;
}
}
public bool TryAdvance(int requestedBy)
{
if (CurrentState.CanProgress())
{
string fromState = CurrentState.Name;
CurrentState = CurrentState.GetNextState();
IsCompleted = CurrentState.IsFinalState ? true : false;
History hst = new History()
{
FromState = fromState,
ToState = CurrentState.Name,
InstanceId = InstanceId,
TransitionBy = requestedBy,
TransitionDate = DateTime.Now
};
using (WorkflowEntities db = new WorkflowEntities())
{
Instance ins = db.Instances.Single(x => x.InstanceId == this.InstanceId);
ins.WorkflowData = Wrap();
db.Entry(ins).State = EntityState.Modified;
db.Entry(hst).State = EntityState.Added;
db.SaveChanges();
}
return true;
}
return false;
}