当 IDENTITY_INSERT 设置为 OFF 错误时，无法为标识列插入显式值

Question

尝试向表中插入值时出现此错误。 该表是使用以下脚本创建的：

    CREATE TABLE [dbo].[Audit_PatientControlledSubstanceAgreement](
    [PatientID] [bigint] NOT NULL,
    [UsersID] [bigint] NOT NULL,
    [DateAdded] [date] NOT NULL,
    [FileName] [nvarchar](500) NULL,
    [FilePath] [nvarchar](max) NULL,
    [FileType] [nvarchar](50) NULL,
    [NextScheduledDate] [date] NULL,
    [CreateDT] [datetime2](7) NULL,
    [AgreementType] [nvarchar](50) NULL,
    [Deleted] [bit] NOT NULL,
    [ID] [int] IDENTITY(1,1) NOT NULL,
 CONSTRAINT [PK_Audit_PatientControlledSubstanceAgreement] PRIMARY KEY CLUSTERED 
(
    [ID] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)
)

我什至尝试将 IDENTITY_INSERT 更改为 ON，但仍然遇到相同的错误。我正在使用下面的代码将项目插入到表中：`

    var Audit_PatientControlledSubstanceAgreement = new Audit_PatientControlledSubstanceAgreement
                            {
                                CreateDT = DateTime.Now,
                                Deleted = true,
                                AgreementType = model.AgreementType,
                                DateAdded = model.DateAdded,
                                FileName = model.FileName,
                                FilePath = model.FilePath,
                                FileType = model.FileType,
                                NextScheduledDate = model.NextScheduledDate,
                                PatientID = model.PatientID,
                                UsersID = model.UsersID
                            };

                            db.Audit_PatientControlledSubstanceAgreement.Add(Audit_PatientControlledSubstanceAgreement);
                            db.SaveChanges();

`

Answer 1

在Id上方添加这一行：

[DatabaseGenerated(DatabaseGeneratedOption.Identity)]

像这样

[DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public int Id { get; set; }