Question

我尝试在asp.net web proyect和sql server 2012标准版中的Entity框架4上使用带有隔离级别快照的TransactionScope。我收到此错误Transactions with IsolationLevel Snapshot cannot be promoted.

     using (var scope = new TransactionScope(TransactionScopeOption.RequiresNew, 
                new TransactionOptions { IsolationLevel = IsolationLevel.Snapshot })) { 

                    using (var db = new Datos.TestDBDataContext(System.Configuration
    .ConfigurationManager.ConnectionStrings["ApplicationServices"].ConnectionString))
                            {                   
                                Datos.Contacto newUser = new Datos.Contacto
                                {
                                    name = user.name,
                                    lastName = user.lastName,
                                    type = user.type,
                                    userId = user.userId,
                                    email = user.Email,
                                    password = Password(),
                                    jobCode = user.JobCode,                                
                                    DateCreated = user.DateCreated,
                                    cityCode = user.cityCode,
                                    numberPass = user.numberPass,
                                    place = user.place,
                                    estate = false
                                };

                                db.Contacts.InsertOnSubmit(newUser);
                                db.SubmitChanges();                
                        }
                        scope.Complete();
   }

我做错了什么？

Answer 1

请尝试如下所示。设置IsolationLevel.Serializable。

可序列化：可以读取易失性数据但不能修改，也不会有新的可以在交易期间添加数据。

IsolationLevel Enumeration

var scope = new TransactionScope(TransactionScopeOption.RequiresNew, 
   new TransactionOptions { 
         IsolationLevel = IsolationLevel.Snapshot, 
         IsolationLevel = IsolationLevel.Serializable,
})

使用隔离级别快照实体框架4

1 个答案: