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  • LINQ to SQL Transaction(转)

    DLinq 对事务的支持非常灵活。缺省情况下,DataContext.SubmitChanges() 就会自动启动一个事务,确保所有操作在同一个事务下进行。
    public class DataContext : IDisposable
    {
        public virtual void SubmitChanges(ConflictMode failureMode)
        {
            // 省略部分代码...
            
            transaction = this.provider.Connection.BeginTransaction(IsolationLevel.ReadCommitted);
            this.provider.Transaction = transaction;
            
            new ChangeProcessor(this.services, this).SubmitChanges(failureMode);
            
            this.AcceptChanges();
            this.provider.ClearConnection();
            
            transaction.Commit();
            return;
    
            // 省略部分代码...
        }
    }

    我们还可以显示启用 DataContext 的事务。
    using (DataClasses1DataContext context = new DataClasses1DataContext(connStr))
    {
        context.Transaction = context.Connection.BeginTransaction();
        try
        {
            var user = new User { Name = "wangwu", Age = 14 };
            context.Users.Add(user);
            context.SubmitChanges();
    
            context.Transaction.Commit();
        }
        catch
        {
            context.Transaction.Rollback();
        }
    }

    同样,我们可以使用 System.Transactions.TransactionScope 创建跨 DataContext 的分布事务环境。
    using (TransactionScope scope = new TransactionScope())
    {
        try
        {
            using (DataClasses1DataContext context = new DataClasses1DataContext(connStr))
            {
                var user = new User { Name = "wangwu", Age = 14 };
                context.Users.Add(user);
                context.SubmitChanges();
            }
    
            using (DataClasses1DataContext context = new DataClasses1DataContext(connStr))
            {
                var user = new User { Name = "wangwu", Age = 14 };
                context.Users.Add(user);
                context.SubmitChanges();
            }
    
            scope.Complete();
        }
        catch
        {
        }
    }
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  • 原文地址:https://www.cnblogs.com/YSO1983/p/1825240.html
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