Question

已经提出了类似的问题，但无法找到效果很好的解决方案。我所拥有的是一个相当大的对象（Viper对象），它有几个子对象和列表。我将每秒多次收到一个Viper对象的新实例，我需要将这些数据合并到一个“主”Viper对象中。如果属性为null，则跳过它，如果不替换它。作为列表的一些属性将仅被新属性替换，一些列表属性将仅将新列表附加到现有属性。

重点是，有些属性需要一些自定义逻辑来确定如何执行合并。问题是我应该使用类似AutoMapper / Value Injector的东西，还是只在数据模型中编写一个自定义Merge命令来获取另一个Viper对象？这需要尽可能高效，因为它会被大量调用。

以下是数据模型：

public class Viper
{
    #region INotifyPropertyChanged Members
    public event PropertyChangedEventHandler PropertyChanged;

    protected void OnPropertyChanged(string property)
    {
        if (PropertyChanged != null)
        {
            PropertyChanged(this, new PropertyChangedEventArgs(property));
        }
    }
    #endregion

    [DataMember(IsRequired = false, EmitDefaultValue = false)]
    public int ViperId { get; set; }

    [DataMember]
    public int CaseId { get; set; }

    [DataMember]
    public int RecordCount { get; set; }

    [DataMember(IsRequired = false, EmitDefaultValue = false)]
    public string SerialNumber { get; set; }

    [DataMember(IsRequired = false, EmitDefaultValue = false)]
    public string UserName { get; set; }

    [DataMember(IsRequired = false, EmitDefaultValue = false)]
    public string GroupName { get; set; }

    [DataMember]
    public Byte Status { get; set; }
    [DataMember]
    public int CaseStage { get; set; }

    [DataMember(IsRequired = false,EmitDefaultValue = false)]
    public CaseDetail CaseDetail { get; set; }

    private ViperMetaData _metaData;
    [DataMember(IsRequired = false, EmitDefaultValue = false)]
    public ViperMetaData MetaData {
        get { return _metaData; }
        set
        {
            _metaData = value;
            OnPropertyChanged("MetaData");
        }
    }

    [DataMember(IsRequired = false, EmitDefaultValue = false)]
    public List<CasePatientData> PatientDetailsTable1 { get; set; }
    [DataMember(IsRequired = false, EmitDefaultValue = false)]
    public List<CasePatientData> PatientDetailsTable2 { get; set; }
    [DataMember(IsRequired = false, EmitDefaultValue = false)]
    public List<CasePatientData> PatientDetailsTable3 { get; set; }
    [DataMember(IsRequired = false, EmitDefaultValue = false)]
    public List<CasePatientData> PatientDetailsTable4 { get; set; }

    [DataMember(IsRequired = false, EmitDefaultValue = false)]
    public List<CaseChannel> CaseChannelDataList { get; set; } // list of all channels available in a specific case/viper

    [DataMember(IsRequired = false, EmitDefaultValue = false)]
    public List<EventsData> EventsDataList { get; set; }


    [DataMember(IsRequired = false, EmitDefaultValue = false)]
    public List<ChannelData> ChannelDataList { get; set; }

    [DataMember(IsRequired = false, EmitDefaultValue = false)]
    public CasePatientDetails CasePatientDetails { get; set; }

    [DataMember(IsRequired = false, EmitDefaultValue = false)]
    public List<CaseFluids> CaseFluidsList { get; set; }

    [DataMember(IsRequired = false, EmitDefaultValue = false)]
    public List<PatientTable> PatientTableNames { get; set; }

    [DataMember]
    public int? TimeOffset { get; set; }

    [DataMember(IsRequired = false,EmitDefaultValue = false)]
    public string Html { get; set; }

    [DataMember(IsRequired = false, EmitDefaultValue = false)]
    public List<CaseDocument> CaseDocuments { get; set; }
    [DataMember(IsRequired = false, EmitDefaultValue = false)]
    public Department Department { get; set; }
    [DataMember(IsRequired = false, EmitDefaultValue = false)]
    public List<Gauge> Gauges { get; set; }
    [DataMember(IsRequired = false, EmitDefaultValue = false)]
    public List<Region> Regions { get; set; }
    [DataMember(IsRequired = false, EmitDefaultValue = false)]
    public List<BloodGasData> BloodGasDataList { get; set; }
    [DataMember(IsRequired = false, EmitDefaultValue = false)]
    public List<CardioplegiaData> CardioplegiaDataList { get; set; }
    [DataMember(IsRequired = false, EmitDefaultValue = false)]
    public List<ComplianceDataUnit> ComplianceDataList { get; set; }
}

Answer 1

我会像你提到的那样使用Auto Mapper或Value Injector。特别是如果您的属性名称与对象类似，则几乎不需要编写任何代码。对于自定义映射，编写自定义函数以传递给映射方法非常容易。很有用。快速伪造的代码看起来像：

AutoMapper.Mapper.CreateMap<Viper, ViperDto>()
     .ForMember(dest => dest.Property, opt => opt.NullSubstitute("N/A"));
var merged = AutoMapper.Mapper.Map(viper, viperDTO);

在.Net中使用相同类型的另一个对象更新对象的最佳方法？

1 个答案: