private bool Validate(Contact contact, out string errorMsg)
{
errorMsg = null;
if (string.IsNullOrWhiteSpace(contact.Name))
{
errorMsg = "姓名不可为空";
return(false);
}
if (string.IsNullOrWhiteSpace(contact.Phone))
{
errorMsg = "电话号码不可为空";
return(false);
}
if (!phoneRegex.IsMatch(contact.Phone))
{
errorMsg = "电话号码格式错误";
return(false);
}
if (!string.IsNullOrWhiteSpace(contact.Email) && !emailRegex.IsMatch(contact.Email))
{
errorMsg = "电子邮件格式错误";
return(false);
}
return(true);
}
public void Remove()
{
Contact temp = Selected;
this.Contacts.Remove(temp);
using (ContactsDbContext context = new ContactsDbContext())
{
DbEntityEntry <Contact> entry = context.Entry(temp);
entry.State = EntityState.Deleted;
context.SaveChanges();
}
}
public bool Save(out string errorMsg)
{
if (!Validate(Selected, out errorMsg))
{
return(false);
}
errorMsg = null;
using (ContactsDbContext context = new ContactsDbContext())
{
string cstr = ((IObjectContextAdapter)context).ObjectContext.Connection.ConnectionString;
if (Selected.Id == 0)
{
context.ContactSet.Add(Selected);
}
else
{
Contact existed = (from c in context.ContactSet where c.Id == Selected.Id select c).FirstOrDefault();
if (existed != null)
{
existed.Name = Selected.Name;
existed.Email = Selected.Email;
existed.Phone = Selected.Phone;
existed.Photo = Selected.Photo;
context.Entry(existed).State = EntityState.Deleted;
}
else
{
return(true); // 设置断点来debug
}
}
bool hasChange = context.ChangeTracker.HasChanges();
if (hasChange)
{
try
{
int resultAffected = context.SaveChanges();
}
catch (Exception ex)
{
string error = ex.Message;
throw;
}
}
// 确认
//List<Contact> news = context.ContactSet.SqlQuery("select * from contact").ToList();
//int count = news.Count;
//bool hasAdded = count == Contacts.Count;
}
return(true);
}