我正在学习 EF,但我遇到了导航问题。我希望你们能告诉我路径:)
当我运行此代码时,EF 显示此消息:
System.Reflection.TargetInvocationException:调用的目标已引发异常。---> System.MissingMethodException:找不到方法:'System.Collections.Generic.List`1 Sis.Model.Ft1Cap300.get_Ft1Cap300l()'。”
我真的不明白问题出在哪里;我认为我的导航属性还可以,但 EF 说它无法识别 Ft1Cap300.Ft1Cap300l 属性。
我有 3 个模型实体。我将发布课程及其配置
public class Ft1Caratula
{
[Key]
public String EncuestaId { get; set; }
public Int32 DistritoId { get; set; } //fk
public String Conglomerado { get; set; }
[Required]
public Int32 Area { get; set; }
[Required]
public Int32 NumHogar { get; set; }
[Required]
public Int32 TotHogar { get; set; }
public Int32 TipoComunidad { get; set; }
[Required]
public String JefeNombres { get; set; }
[Required]
public String JefeApePat { get; set; }
[Required]
public String JefeApeMat { get; set; }
public Int32 DirTipo { get; set; }
public String DirDireccion { get; set; }
public Nullable<Int32> Dir1 { get; set; }
public String Obs { get; set; }
public Int32 Idioma { get; set; }
public String Idioma_o { get; set; }
[Required]
public DateTime Ent1Fecha { get; set; }
[Required]
public Int32 Ent1Res { get; set; }
public String Ent1Res_o { get; set; }
public String EncId { get; set; }
public DateTime EncFecha { get; set; }
public virtual UbiDistrito Distrito { get; set; }
public virtual SegTecnico Encuestador { get; set; }
public virtual List<Ft1Cap100> Ft1Cap100 { get; set; }
public virtual List<Ft1Cap300> Ft1Cap300 { get; set; }
}
public class Ft1Cap300
{
public String EncuestaId { get; set; }
[Required]
public int P301 { get; set; }
public virtual Ft1Caratula Ft1Caratula { get; set; }
public virtual List<Ft1Cap300l> Ft1Cap300l { get; set; }
}
public class Ft1Cap300l
{
public String EncuestaId { get; set; }
public int NOrden { get; set; }
public String P302 { get; set; }
[Required]
public int P303 { get; set; }
[Required]
public int P304 { get; set; }
public String P305_1 { get; set; }
public String P305_2 { get; set; }
public String P305_3 { get; set; }
public virtual Ft1Cap300 Ft1Cap300 { get; set; }
}
public class Ft1CaratulaConfiguracion : EntityTypeConfiguration<Ft1Caratula>
{
public Ft1CaratulaConfiguracion()
{
ToTable("ft1caratula", "data");
HasRequired(p => p.Encuestador).WithMany(l => l.Ft1Caratulas).HasForeignKey(p => p.EncId);
HasRequired(p => p.Distrito).WithMany(l => l.Ft1Caratulas).HasForeignKey(p => p.DistritoId);
}
}
public class Ft1Cap300Configuracion : EntityTypeConfiguration<Ft1Cap300>
{
public Ft1Cap300Configuracion()
{
ToTable("ft1cap300", "data");
HasKey(p => new { p.EncuestaId });
HasRequired(p => p.Ft1Caratula).WithMany(l => l.Ft1Cap300).HasForeignKey(p => p.EncuestaId);
}
}
public class Ft1Cap300lConfiguracion : EntityTypeConfiguration<Ft1Cap300l>
{
public Ft1Cap300lConfiguracion()
{
ToTable("ft1cap300l", "data");
HasKey(p => new { p.EncuestaId, p.NOrden });
HasRequired(p => p.Ft1Cap300).WithMany(l => l.Ft1Cap300l).HasForeignKey(p => p.EncuestaId);
}
}
我希望你能帮我解决这个问题。我有“Programming EF: CodeFirst”一书作为指南。