public virtual void Parse()
        {
            this._identifier = this._command.Substring(0, 2);

            if (this.CommandFields != null)
            {
                int position = 3;
                foreach (var item in this.CommandFields)
                {
                    //是否定义映射的属性
                    if (!string.IsNullOrEmpty(item.Name))
                    {
                        //是否是必选的字段
                        if (!item.IsRequired)
                        {
                            //是否存在必选值
                            if (!this.Command.Contains(item.ID))
                            {
                                continue;
                            }
                        }
                        else if (!string.IsNullOrEmpty(item.ID) && !this.Command.Contains(item.ID))
                        {
                            throw new ParameterException($"can not find property {item.Name} value");
                        }
                        var property = this.GetType().GetProperties().SingleOrDefault(p => p.Name.Equals(item.Name, StringComparison.CurrentCultureIgnoreCase));// .GetProperty(item.Name,System.Reflection.BindingFlags.IgnoreCase);
                        if (property != null)
                        {
                            string fieldValueSegment = string.Empty;
                            if (item.IsFixed)
                            {
                                fieldValueSegment = GetFixedLengthFieldValue(position, item.FixedLength);
                            }
                            else
                            {
                                fieldValueSegment = GetVariableLengthFieldValue(position, item.Split);
                            }

                            if (!string.IsNullOrEmpty(fieldValueSegment))
                            {
                                string fieldValue = fieldValueSegment;
                                if (!string.IsNullOrEmpty(item.ID))
                                {
                                    fieldValue = fieldValueSegment.Replace(item.ID, "").Replace(item.Split, "");
                                }
                                //解析获取到的值
                                if (property.PropertyType == typeof(int))
                                {
                                    property.SetValue(this, Convert.ToInt32(fieldValue));
                                }
                                else if (property.PropertyType == typeof(DateTime))
                                {
                                    property.SetValue(this, CommandUtil.GetDate(fieldValue));
                                }
                                else if (property.PropertyType == typeof(bool))
                                {
                                    property.SetValue(this, CommandUtil.GetBooleanValue(fieldValue));
                                }
                                else if (property.PropertyType == typeof(char))
                                {
                                    property.SetValue(this, fieldValue[0]);
                                }
                                else if (property.PropertyType == typeof(string))
                                {
                                    property.SetValue(this, fieldValue);
                                }

                                position += fieldValueSegment.Length;
                            }
                        }
                    }
                }
            }
        }