实体未保存更新的记录？

Question

我有一个基本保存更改功能，但它没有工作，它没有返回错误，只是没有写入数据库。

    Appointment _appointment = new Appointment();
    int errorCount = 0;

    Patient _patient = new Patient();
    _patient = SourceDal.getPatientByPatientId(txtPatientId.Text);
    _patient.SSN = txtSSN.Text;

    _patient.FirstName = txtPatientFirstName.Text;
    _patient.LastName = txtPatientLastName.Text;
    _patient.Middle = txtPatientMiddle.Text;
    _patient.AddressOne = txtPatientAddressOne.Text;
    _patient.City = txtPatientCity.Text;
    _patient.State = txtPatientState.Text;
    _patient.ZipCode = txtPatientZip.Text;


    _patient.HomePhone = txtPatientHomePhone.Text;
    _patient.WorkPhone = txtPatientWorkPhone.Text;
    _patient.CellPhone = txtPatientCellPhone.Text;

    if (rBtnHomePhone.Checked == true)
    _patient.ApptPhone = txtPatientHomePhone.Text;
    if (rBtnHomePhone.Checked == true)
    _patient.ApptPhone = txtPatientHomePhone.Text;
    if (rBtnWorkPhone.Checked == true)
    _patient.ApptPhone = txtPatientWorkPhone.Text;


    _patient.BirthDate = dtBirthDate.DateTime;
    _patient.emailAddress = txtPatientEmail.Text;
    _patient.Race = (int)dpRace.SelectedValue;
    _patient.Ethnicity = (int)dpEthnicity.SelectedValue;
    _patient.Language = (int)dpLanguages.SelectedValue;

    _patient.AlertNote = txtPatientNotes.Text;


    if (dpGender.Text == "")
    {
    dpGender.Focus();
    errorCount = 1;
    lblGenderRequired.Text = "* Gender is required.";

    }
    else
    {
    errorCount = 0;
    lblGenderRequired.Visible = false;
    }
    _patient.Gender = dpGender.Text.Substring(0, 1);




    _patient.PatientID = txtPatientId.Text;
    txtPatientFirstName.Text = _patient.FirstName;
    txtPatientLastName.Text = _patient.LastName;
    if(updateOrSave == false) // IF ITS SAVE NEW GO AHEAD ADD IT TO THE CONTEXT.                
    SourceDal.AddToPatient(_patient);

    SourceDal.SaveChanges();

我的源dal由继承上下文基础的函数组成，具有以下

public abstract int SaveChanges();

protected int SaveChanges(System.Data.Entity.Core.Objects.ObjectContext context)
 {
            try
            {
                int i = context.SaveChanges();

                if (i == 0)
                    return 0;

                return 1;
            }
            catch (Exception ex)
            {
                throw new EntityContextException("SaveChanges failed.", ex);
            }
}

没有错误，所以不会出现什么问题我将SourceDal声明为

 SourceContext SourceDal = new SourceContext();

这是我在源头上的保存行为

    public  override int SaveChanges()
    {

        try
        {
            using (var myContext = new SMBASchedulerEntities(this.Connectionstring))
            {

                return myContext.SaveChanges();
            }
        }
        catch (DbEntityValidationException e)
        {
            foreach (var eve in e.EntityValidationErrors)
            {
                Console.WriteLine("Entity of type \"{0}\" in state \"{1}\" has the following validation errors:",
                    eve.Entry.Entity.GetType().Name, eve.Entry.State);
                foreach (var ve in eve.ValidationErrors)
                {
                    Console.WriteLine("- Property: \"{0}\", Error: \"{1}\"",
                        ve.PropertyName, ve.ErrorMessage);
                }
            }
            throw;
        }
    }

修改2

我甚至尝试了以下操作，但仍然没有保存患者记录，AddToPaient工作正常

  public void SavePatient(Patient _patient)
    {
        try { 
            using (var myContext = new SMBASchedulerEntities(this.Connectionstring))
        {

            myContext.Entry(_patient).State = System.Data.Entity.EntityState.Modified;

            myContext.SaveChanges();
        }
        }
        catch (Exception EX)
        { }
    }