c# - 如何为 SqlTransaction.Save() 设置超时？

Question

我得到:

System.Data.SqlClient.SqlException (0x80131904): Timeout expired.  The timeout period elapsed prior to completion of the operation or the server is not responding. ---> System.ComponentModel.Win32Exception (0x80004005): The wait operation timed out
at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
   at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)
   at System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady)
   at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj)
   at System.Data.SqlClient.TdsParser.TdsExecuteTransactionManagerRequest(Byte[] buffer, TransactionManagerRequestType request, String transactionName, TransactionManagerIsolationLevel isoLevel, Int32 timeout, SqlInternalTransaction transaction, TdsParserStateObject stateObj, Boolean isDelegateControlRequest)
   at System.Data.SqlClient.SqlInternalConnectionTds.ExecuteTransactionYukon(TransactionRequest transactionRequest, String transactionName, IsolationLevel iso, SqlInternalTransaction internalTransaction, Boolean isDelegateControlRequest)
   at System.Data.SqlClient.SqlInternalTransaction.Save(String savePointName)
   at System.Data.SqlClient.SqlTransaction.Save(String savePointName)

如何增加 SqlTransaction.Save() 的超时时间？

Answer 1

现在我真的希望我没有鼓励 PSVSupporter 删除他的答案(如果他取消删除，请给他投票)。

在内部，当您发出任何事务请求时，该请求使用基础连接的 ConnectionTimeout 属性作为查询的 CommandTimeout。

你可以在源码中遵循这个过程，重要的部分在SqlInternalConnectionTds.ExecuteTransactionYukon 和SqlInternalConnectionTds.ExecuteTransactionPreYukon 都通过ConnectionOptions.ConnectTimeout在它们调用的函数的 timeout 参数中。因此，要解决您的问题，请在创建连接时使用更大的 ConnectionTimeout。

SqlTransaction

    public void Save(string savePointName) {
        //SNIP
                _internalTransaction.Save(savePointName);
        //SNIP
    }

SqlInternalTransaction

   internal void Save(string savePointName) {
        //SNIP
             _innerConnection.ExecuteTransaction(SqlInternalConnection.TransactionRequest.Save, savePointName, IsolationLevel.Unspecified, null, false);
        //SNIP
    }

SqlInternalConnectionTds

    override internal void ExecuteTransaction(TransactionRequest transactionRequest, string name, IsolationLevel iso, SqlInternalTransaction internalTransaction, bool isDelegateControlRequest) {
        //SNIP

        if (!_parser.IsYukonOrNewer) {
            ExecuteTransactionPreYukon(transactionRequest, transactionName, iso, internalTransaction);
        }
        else {
            ExecuteTransactionYukon(transactionRequest, transactionName, iso, internalTransaction, isDelegateControlRequest);
        }
    }

    internal void ExecuteTransactionPreYukon(
                TransactionRequest      transactionRequest, 
                string                  transactionName, 
                IsolationLevel          iso, 
                SqlInternalTransaction  internalTransaction) {
        //SNIP

        Threading.Tasks.Task executeTask = _parser.TdsExecuteSQLBatch(sqlBatch.ToString(), 
             ConnectionOptions.ConnectTimeout, null, _parser._physicalStateObj, sync: true);

        //SNIP
    }

    internal void ExecuteTransactionYukon(
                TransactionRequest      transactionRequest, 
                string                  transactionName, 
                IsolationLevel          iso, 
                SqlInternalTransaction  internalTransaction, 
                bool                    isDelegateControlRequest) {
            //SNIP

            _parser.TdsExecuteTransactionManagerRequest(null, requestType, transactionName, isoLevel,
                ConnectionOptions.ConnectTimeout, internalTransaction, stateObj, isDelegateControlRequest);

            //SNIP
    }