[英]Rollingback a transaction in .Net Entity Framework
我有一个MVC动作控制器方法,如下所示:
public ActionResult Register(ViewModel.User model)
{
DbContextTransaction dbTransaction = null;
if (ModelState.IsValid)
{
try
{
UserAccountLogic registerUser = new UserAccountLogic();
dbTransaction = registerUser.RegisterUser(model);
Mail.SendEmail(model.Email, model.FirstName);
dbTransaction.Commit();
//Session["Email"] = model.Email;
ViewBag.Style = "block";
}
catch (Exception e)
{
dbTransaction.Rollback();
log.Error(e.Message, e);
}
}
// If we got this far, something failed, redisplay form
return View(model);
}
RegisteredUser函数在业务层中的位置为:
public DbContextTransaction RegisterUser(User model)
{
//var userEntity = Mapper.Map<User, Dal.UserInfo>(model);
var userEntity = MapModelToEntity(model);
var registerService = new Dal.AccountService();
return registerService.SaveRegisterDetails(userEntity);
}
和SaveRegisterDetails函数在DataAccessLayer中的形式为:
public DbContextTransaction SaveRegisterDetails(UserInfo registerDetails)
{
//TransactionModel transactionModel = new TransactionModel();
using (HealthCarePortalEntities context = new HealthCarePortalEntities())
{
using (DbContextTransaction dbTran = context.Database.BeginTransaction())
{
context.UserInfo.Add(registerDetails);
context.SaveChanges();
return dbTran;
}
}
现在我的问题是,当向用户发送激活链接时出现异常时,我想回滚事务,即从数据库中新注册的用户数据。 但是问题是我正在回滚的部分发生异常,因为数据库连接为空。 所以我的问题是我如何才能在另一层的Controller中获得DAL层的连接。 谢谢您的帮助。
您只需要实现IDisposable
private void Dispose(bool disposing)
{
// ...
if (disposing && (this._innerConnection != null))
{
this._disposing = true;
this.Rollback(); // there you go
}
}
您可以使用环境交易模型。
using(TransactionScope tran = new TransactionScope()) {
UserAccountLogic registerUser = new UserAccountLogic();
dbTransaction = registerUser.RegisterUser(model);
Mail.SendEmail(model.Email, model.FirstName);
tran.Complete();
}
这样,如果事务范围内发生异常,则数据库将回滚数据。
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