[英]multiple navigation properties to the same table using code first
我有一對多關系設置。 IT工作正常,但現在我正在嘗試使用pdfsharp,並且在導航屬性方面需要一些幫助。 每個測量都有4張圖片。 前,后,右,左。 我需要在pdf中包括所有4張圖片。 我無法用我現在擁有的來達到他們。 我可以在表格中返回每次測量的圖片列表。 只是不知道如何更改它才能正常工作。
public class Measurement
{
[Key]
[DatabaseGeneratedAttribute(DatabaseGeneratedOption.None)]
public Guid Id { get; set; }
public DateTime? MeasurementDate { get; set; }
public decimal? BustMeasurement { get; set; }
public decimal? ChestMeasurement { get; set; }
public decimal? FAT { get; set; }
public string MeasurementUploadBy { get; set; }
public DateTime? MeasurementUploadDate { get; set; }
public DateTime? MeasurementEditDate { get; set; }
public string MeasurementEditBy { get; set; }
public int? ClientId { get; set; }
[ForeignKey("ClientId")]
public virtual Client Client { get; set; }
public virtual ICollection<Picture> Pictures { get; set; }
}
public class Picture
{
public int Id { get; set; }
public string PictureFrontUrl { get; set; }
public string PictureBackUrl { get; set; }
public string PictureRightSideUrl { get; set; }
public string PictureLeftSideUrl { get; set; }
public string PictureNote { get; set; }
public string PictureUploadBy { get; set; }
public DateTime? PictureUploadDate { get; set; }
public DateTime? PictureDate { get; set; }
public string ClientName { get; set; }
public string PictureType { get; set; }
public Guid MeasurementId { get; set; }
[ForeignKey("MeasurementId")]
public virtual Measurement Measurement { get; set; }
}
MeasurementApi
public Measurement GetMeasurement(Guid id)
{
using (var context = new ApplicationDbContext())
{
Measurement model = new Measurement();
model = context.Measurements
.Include(x => x.Pictures)
.FirstOrDefault(j => j.Id == id);
return model;
}
}
PDFSharp GEt電話
apiMeasurementController adapter = new apiMeasurementController();
Measurement model = new Measurement();
model = adapter.GetMeasurement(id);
如果您想讓Measurement擁有4張圖片,而不是一張Colleciton圖片,則應該具有以下內容:
public class Measurement
{
[Key]
[DatabaseGeneratedAttribute(DatabaseGeneratedOption.None)]
public Guid Id { get; set; }
....
// Won't need these
// public virtual ICollection<Picture> Pictures { get; set; }
public virtual Picture LeftPicture { get; set; }
public virtual Picture TopPicture { get; set; }
public virtual Picture RightPicture { get; set; }
public virtual Picture BottomPicture { get; set; }
}
和你的照片:
public class Picture
{
public int Id { get; set; }
// Don't need these 4 any more.
// public string PictureFrontUrl { get; set; }
// public string PictureBackUrl { get; set; }
// public string PictureRightSideUrl { get; set; }
// public string PictureLeftSideUrl { get; set; }
public string PictureUrl { get; set; }
public string PictureNote { get; set; }
public string PictureUploadBy { get; set; }
public DateTime? PictureUploadDate { get; set; }
public DateTime? PictureDate { get; set; }
public string ClientName { get; set; }
public string PictureType { get; set; }
public Guid MeasurementId { get; set; }
[ForeignKey("MeasurementId")]
public virtual Measurement Measurement { get; set; }
}
並在您的API中
public Measurement GetMeasurement(Guid id)
{
using (var context = new ApplicationDbContext())
{
Measurement model = new Measurement();
model = context.Measurements
.Include(x => x.LeftPicture)
.Include(x => x.TopPicture)
.Include(x => x.RightPicture)
.Include(x => x.BottomPicture)
.FirstOrDefault(j => j.Id == id);
return model;
}
}
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