如何获取一组反序列化数据并将其存储到实体框架数据库中？

Question

我能够通过使用用户导入 xml 文件来反序列化我的数据。现在，我想知道如何使用 Entity Framework/ADO.NET 获取反序列化的 xml 数据并将其存储到我的本地数据库中？

我的模特：

[Serializable]
[XmlRoot("lot_information")]
public class LotInformation
{

    [Key]
    public int Id { get; set; }

    [XmlArray("components")]
    [XmlArrayItem("component", typeof(Components))]
    public Components[] components { get; set; }

    [XmlArray("families")]
    [XmlArrayItem("control", typeof(Families))]
    public Families[] families { get; set; }

    [XmlAttribute("exp_date")]
    public DateTime exp_date { get; set; }

    [XmlAttribute("lot_number")]
    public string lot_number { get; set; }


}

[Serializable]
public class Components
{
    [Key]
    public int Id { get; set; }

    [XmlAttribute("control")]
    public string aControl { get; set; }

    [XmlAttribute("cal_ref")]
    public string cal_ref { get; set; }

    [XmlAttribute("family")]
    public string family { get; set; }

    [XmlAttribute("component")]
    public int component { get; set; }

    [XmlAttribute("id")]
    public string componentId { get; set; }

    [XmlElement("target")]
    public int target { get; set; }

    [XmlElement("min")]
    public int min { get; set; }

    [XmlElement("max")]
    public int max { get; set; }

    [XmlElement("number")]
    public int number { get; set; }
}

[Serializable]
public class Families
{

    [Key]
    public int Id { get; set; }

    [XmlAttribute("family")]
    public string controlFamily { get; set; }

    [XmlAttribute("pctrl")]
    public string pctrl { get; set; }

}

我的数据上下文：

 class DMIDataContext : DbContext
{
    public DbSet<Components> Components { get; set; }
    public DbSet<Families> Families { get; set; }
    public DbSet<ReagentLotInformation> ReagentLotInformation {get;set;}

    public DMIDataContext() : base("DMIConnectionString")
    {
    }

    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        base.OnModelCreating(modelBuilder);
    }

我的视图模型： 数据库连接摘录：

  public static void DeSerializationXML(string filePath)
    {
        XmlRootAttribute xRoot = new XmlRootAttribute();
        xRoot.ElementName = "lot_information";
        xRoot.IsNullable = false;

        // Create an instance of lotinformation class.
        var lot = new LotInformation();

        // Create an instance of stream writer.
        TextReader txtReader = new StreamReader(filePath);

        // Create and instance of XmlSerializer class.
        XmlSerializer xmlSerializer = new XmlSerializer(typeof(LotInformation), xRoot);

        // DeSerialize from the StreamReader
        lot = (LotInformation)xmlSerializer.Deserialize(txtReader);

        // Close the stream reader
        txtReader.Close();

 using (var db = new DMIDataContext())
        {LotInformation newLot = new LotInformation();

            if (newLot != null)
            {
                newLot.Id = lot.Id;
                newLot.lot_number = lot.lot_number;
                newLot.exp_date = lot.exp_date;

          for (int i = 0; i < lot.Components.Length; i++)
                {

                           newLot.Components[i].aControl = lot.Components[i].aControl;
                           newLot.Components[i].cal_ref = lot.Components[i].cal_ref;
                           newLot.Components[i].family = lot.Components[i].family;
                           newLot.Components[i].component = lot.Components[i].component;
                           newLot.Components[i].componentId = lot.Components[i].componentId;
                           newLot.Components[i].target = lot.Components[i].target;
                           newLot.Components[i].min = lot.Components[i].min;
                           newLot.Components[i].number = lot.Components[i].number;

}
                 db.LotInformation.Add(newLot);
                 db.SaveChanges();

我遇到的问题是我能够很好地将 exp_date 和 lot_number 传递给我的表。只是组件和系列的数组返回 NULL。我认为这与我将日期数组传递到数据库但数据库不理解数组有关。

如何修复我的类，以便将数据数组传递到数据库中？

如果您有任何问题，请告诉我。谢谢。

Answer 1

你可以试试这个： 你可以用List代替ICollection

 [Serializable]
 [XmlRoot("lot_information")]
 public class LotInformation
 {

  Public LotInformation()
  {
    Components = new List<Components>();
    Families = new List<Families>();
  }

 [Key]
 public int Id { get; set; }

 [XmlArray("components")]
 [XmlArrayItem("component", typeof(Components))]
 public List<Components> Components { get; set; }

 [XmlArray("families")]
 [XmlArrayItem("control", typeof(Families))]
 public List<Families> Families { get; set; }

 ....

}

在您的 ViewModel 中：

using (var db = new DMIDataContext())
    {LotInformation newLot = new LotInformation();

            newLot.Id = lot.Id;
            newLot.lot_number = lot.lot_number;
            newLot.exp_date = lot.exp_date;

      foreach (Components comp in lot.Components)
            {

                       newLot.Components.Add(comp);

             }
      foreach (Families fam in lot.Families)
            {

                       newLot.Families.Add(fam);

             }
             db.LotInformation.Add(newLot);
             db.SaveChanges();

我希望它会有所帮助。 正如你在这个link 中看到的，你可以使用List。