sqlserver超时时间已到

public DataTable GetProDataTable(string produceName, SqlParameter[] para)
        {
            DataTable dt = new DataTable();
            SqlCommand command = new SqlCommand(produceName, this.sqlconn);
            if (this.sqlTran != null)
            {
                command.Transaction = this.sqlTran;
            }
            if (this.CommandTimeout != -1)
            {
                command.CommandTimeout = this.CommandTimeout;
            }
            command.CommandType = CommandType.StoredProcedure;
            command.Parameters.AddRange(para);
            try
            {
                /* 这部分代码会占满连接池，产生异常
                if (this.sqlconn.State == ConnectionState.Closed)
                {
                    this.sqlconn.Open();
                }
                */
                SqlDataAdapter adapter = new SqlDataAdapter(command);
                adapter.Fill(dt);
            }
            catch (SqlException ex)
            {
                //OriginalLog.Error(ex.ToString());
                throw (ex);
            }
            return dt;
        }