转换为 .net core 3.1 后，当前的 TransactionScope 已完成错误

Question

更新到 3.1 后，我们收到的错误消息表明：

System.InvalidOperationException：当前的 TransactionScope 已经完成。

我们对此过程所做的唯一真正改变是从 2.x 使用带括号的语句的方式转移到 3.x 的使用不带括号的语句的方式（推荐）。我们是不是做错了什么？

目前的方式：

// As multiple copies of this service can be running at once, we should lock the table while we flag the messages to be worked on
using var transactionScope = new TransactionScope(TransactionScopeOption.Required, 
              new TransactionOptions() 
              { IsolationLevel = IsolationLevel.ReadCommitted });
messagesToProcess = context.InboundMessageQueueRecords.Where(x => x.State == QueueMessageState.New)
          .OrderBy(x => x.Added)
          .Take(NUMBER_OF_MESSAGES_TO_PROCESS).ToList();
// Flag them as in progress
messagesToProcess.ForEach(x => x.State = QueueMessageState.InProgress);
context.SaveChanges();
transactionScope.Complete();

老路：

// As multiple copies of this service can be running at once, we should lock the table while we flag the messages to be worked on
using (var transactionScope = new TransactionScope(TransactionScopeOption.Required, 
              new TransactionOptions() 
              { IsolationLevel = IsolationLevel.ReadCommitted }))
{
  messagesToProcess = context.InboundMessageQueueRecords.Where(x => x.State == QueueMessageState.New)
            .OrderBy(x => x.Added)
            .Take(NUMBER_OF_MESSAGES_TO_PROCESS).ToList();
  // Flag them as in progress
  messagesToProcess.ForEach(x => x.State = QueueMessageState.InProgress);
  context.SaveChanges();
  transactionScope.Complete();
}

Answer 1

当你到达 using 块的末尾时，它可能完成了作用域。所以我会尝试从旧方式中删除 transactionScope.Complete(); 并检查它是否已完成。