如何从生成的类

Question

我正在使用Xamarin和sqlite.Net以及sqlite.Net扩展。

我从visual studio中生成了我的模型。

我的问题是我想为这些生成的类添加一些属性：ForeignKey，OneToOne等......

我生成的类看起来像这样：

    public partial class Zone : object,      System.ComponentModel.INotifyPropertyChanged {
    private AccueilInvites.VVIPService.Happening HappeningField;

    private int HappeningIdField;

    private int LocalIdField;

    private string NameField;

    [System.Runtime.Serialization.DataMemberAttribute()]
    public AccueilInvites.VVIPService.Happening Happening {
        get {
            return this.HappeningField;
        }
        set {
            if ((object.ReferenceEquals(this.HappeningField, value) != true)) {
                this.HappeningField = value;
                this.RaisePropertyChanged("Happening");
            }
        }
    }

    [System.Runtime.Serialization.DataMemberAttribute()]
    public int HappeningId {
        get {
            return this.HappeningIdField;
        }
        set {
            if ((this.HappeningIdField.Equals(value) != true)) {
                this.HappeningIdField = value;
                this.RaisePropertyChanged("HappeningId");
            }
        }
    }

我的扩展名：

[MetadataType(typeof(Zone_MetaData))]
public partial class Zone
{
    [PrimaryKey]
    public int ai_id { get; set; }
}

public class Zone_MetaData
{
    [OneToOne]
    [System.Runtime.Serialization.DataMemberAttribute()]
    public AccueilInvites.VVIPService.Happening Happening
    {
        get; set;
    }
    [ForeignKey(typeof(Happening))]
    [System.Runtime.Serialization.DataMemberAttribute()]
    public int HappeningId { get; set; }
}

当我在生成的类中直接设置[OneToOne]标记时，我可以创建我的表，如果它只在部分类中它不起作用并抛出一个异常，说它不知道“发生”...任何关于如何在c＃中添加属性到扩展中现有属性的想法

编辑：SQLite抛出异常而不是编译器。     Connection = new SQLiteConnection（platForm，filePath）;             SQLiteService.Instance._dbPath = filePath;             Debug.WriteLine（“[SQLITE] FilePath：{0}”，filePath）;

            Connection.CreateTable<Happening>();
            Connection.CreateTable<Zone>();
            Connection.CreateTable<DeviceConfiguration>();