问C# System.InvalidOperationException:当前TransactionScope已完成

EN

我在执行我的源代码时遇到了这个错误。但我在网上能得到的信息似乎不多。因此，我希望能从这里的专业人士那里得到一些线索。

源代码

public List<string> GetData (List<long> Id)
{
    List<string> data;
    string sql = "select * from tblSample with(nolock) where SampleId in @sampleId";
    Dapper.DynamicParameters param = new Dapper.DynamicParameters();
    param.Add("@sampleId", Id);

    try
    {
        data = this.queryrunner.QueryList(sql, param);
    }
    catch (Exception ex)
    {
        logger.Error(ex.Message, ex);
    }

    return data;
}

QueryRunner类方法

    private void OpenConnection()
    {
        if (this.conn.State != ConnectionState.Open)
        {
            this.conn.Open();
        }
    }

    public List<t> QueryList(String sql, DynamicParameters param)
    {
        List<t> t;

        try
        {
            OpenConnection();
            t = this.conn.Query<t>(sql, param).ToList();
        }
        catch (System.Data.SqlClient.SqlException ex)
        {
            logger.Debug(ex.Message, ex);
            LogSqlErrorException(this.conn.Database, sql, param);
            throw;
        }
        finally
        {
            CloseConnection();
        }

        return t;
    }

以下是错误日志的一部分：

System.InvalidOperationException:当前TransactionScope已完成。

在System.Transactions.Transaction.get_Current()

在System.Data.ProviderBase.DbConnectionPool.GetFromTransactedPool(Transaction&交易中)

at System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject，UInt32 waitForMultipleObjectsTimeout，Boolean allowCreate，Boolean onlyOneCheckConnection，DbConnectionOptions userOptions，DbConnectionInternal& connection)

在System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject，TaskCompletionSource1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection)

at System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource1重试、DbConnectionOptions userOptions、DbConnectionInternal oldConnection、DbConnectionInternal& connection)

at System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection，DbConnectionFactory connectionFactory，TaskCompletionSource1 retry, DbConnectionOptions userOptions)

at System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource1重试，DbConnectionOptions userOptions)

在System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource1 retry)

at System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource1重试)

在System.Data.SqlClient.SqlConnection.Open()