交易范围锁定表

Question

I am using C# 3.5 and I have a code within transaction scope that is locking the tables , how can I prevent the transaction scope from locking these tables ?

Thanks,

Answer 1

Add a TransactionScope with the option RequireNew and set the IsolationLevel to ReadUncommitted :

using (var t = new TransactionScope(TransactionScopeOption.RequireNew,
new TransactionOptions { 
    IsolationLevel = IsolationLevel.ReadUncommitted 
}))
{
    // your code
}

Answer 2

The TransactionScope makes the code block transactional. The inwolved tables are locked while "code" has not been COMMITED/ROLLED BACK .

Answer 3

您应该使用关键字来防止表锁定，例如nolock，但是要注意如何读取它们，例如读取已提交或未提交读，因为这可能会使您陷入所谓的脏读。

Answer 4

I solved this by adding

with(nolock)

to the SQL stored procedures that are involved in the transaction.