IsolationLevel问题.即使设置为ReadUncommited也无法访问表

Question

我对这段代码有些问题.当我运行它时,我希望它不会锁定事务使用的表.为实现此目标,我将隔离级别设置为ReadUncommited.

问题是它仍然锁定表,就像isolationLevel是Serializable一样.我正在使用SQL Server 2008

这是代码:

using (TransactionScope scope = new TransactionScope(TransactionScopeOption.Required, new TransactionOptions() { IsolationLevel = System.Transactions.IsolationLevel.ReadUncommitted }))
{
   while (true)
   {
      using (SqlConnection connection = new SqlConnection(ConnectionString))
      {
         connection.Open();

         Console.WriteLine(Transaction.Current.IsolationLevel);

         SqlUtils.ExecuteNonQuery(connection, "INSERT INTO test4 (test) VALUES ('ASDASDASD')");
      }
      Thread.Sleep(1000);
   }

   scope.Complete();
}

Answer 1

事务隔离级别Read Uncommitted仅在读取数据时应用(如名称所示).它将读取尚未提交的数据.

当我INSERT或UPDATE数据时,我无法阻止SQL Server对表进行锁定.