Visual studio - IDENTITY_INSERT установлен в положение OFF

Question

Я пытаюсь добавить записи в локальную базу данных с помощью команд Visual Studio 2015 и linq to sql, но получаю сообщение об ошибке IDENTITY_INSERT is set to OFF.

Я не вставляю значение для первичного ключа, а Identity Specification установлено на True. Это сгенерированный файл сценария:

CREATE TABLE [dbo].[MONTE_CARLO] (
    [PK]  INT    IDENTITY (1, 1) NOT NULL, 
    [ID]  INT    NOT NULL, 
    [BOOK_COMP] NCHAR (10)  NOT NULL, 
    [GREEK]  NCHAR (10)  NOT NULL, 
    [DP1]  DECIMAL (18, 6) NOT NULL, 
    [DP2]  DECIMAL (18, 6) NOT NULL, 
    [DP3]  DECIMAL (18, 6) NOT NULL, 
    [DP4]  DECIMAL (18, 6) NOT NULL, 
    [DP5]  DECIMAL (18, 6) NOT NULL, 
    [DP6]  DECIMAL (18, 6) NOT NULL, 
    [DP7]  DECIMAL (18, 6) NOT NULL, 
    [DP8]  DECIMAL (18, 6) NOT NULL, 
    [DP9]  DECIMAL (18, 6) NOT NULL, 
    [DP10]  DECIMAL (18, 6) NOT NULL, 
    [DP11]  DECIMAL (18, 6) NOT NULL, 
    [DP12]  DECIMAL (18, 6) NOT NULL, 
    [DP13]  DECIMAL (18, 6) NOT NULL, 
    [DP14]  DECIMAL (18, 6) NOT NULL, 
    [DP15]  DECIMAL (18, 6) NOT NULL, 
    [DP16]  DECIMAL (18, 6) NOT NULL, 
    [DP17]  DECIMAL (18, 6) NOT NULL, 
    [DP18]  DECIMAL (18, 6) NOT NULL, 
    [DP19]  DECIMAL (18, 6) NOT NULL, 
    [DP20]  DECIMAL (18, 6) NOT NULL, 
    [DP21]  DECIMAL (18, 6) NOT NULL, 
    CONSTRAINT [PK_MONTE_CARLO] PRIMARY KEY CLUSTERED ([PK] ASC) 
); 

Это код для обновления DataTable. Я передаю словарь (dct) функции, которая обрабатывает обновление.

Dim mcQuery = From updtMC In DATA.MONTE_CARLOs  'ID exists so update data 
          Where updtMC.ID = CStr(dct("ID")) And updtMC.BOOK_COMP = CStr(dct("BOOK_COMP")) And updtMC.GREEK = CStr(dct("GREEK")) 
          Select updtMC 
      For Each updtMC As MONTE_CARLO In mcQuery 

       updtMC.ID = dct("ID") 
       updtMC.BOOK_COMP = dct("BOOK_COMP") 
       updtMC.GREEK = dct("GREEK") 
       updtMC.DP1 = dct("DP1") 
       updtMC.DP2 = dct("DP2") 
       updtMC.DP3 = dct("DP3") 
       updtMC.DP4 = dct("DP4") 
       updtMC.DP5 = dct("DP5") 
       updtMC.DP6 = dct("DP6") 
       updtMC.DP7 = dct("DP7") 
       updtMC.DP8 = dct("DP8") 
       updtMC.DP9 = dct("DP9") 
       updtMC.DP10 = dct("DP10") 
       updtMC.DP11 = dct("DP11") 
       updtMC.DP12 = dct("DP12") 
       updtMC.DP13 = dct("DP13") 
       updtMC.DP14 = dct("DP14") 
       updtMC.DP15 = dct("DP15") 
       updtMC.DP16 = dct("DP16") 
       updtMC.DP17 = dct("DP17") 
       updtMC.DP18 = dct("DP18") 
       updtMC.DP19 = dct("DP19") 
       updtMC.DP20 = dct("DP20") 
       updtMC.DP21 = dct("DP21") 
      Next 
     End If 

     DATA.SubmitChanges() 

LINQ к SQL файлов для Monte_Carlo:

<Global.System.Data.Linq.Mapping.TableAttribute(Name:="dbo.MONTE_CARLO")> _ 
Partial Public Class MONTE_CARLO 
    Implements System.ComponentModel.INotifyPropertyChanging, System.ComponentModel.INotifyPropertyChanged 

    Private Shared emptyChangingEventArgs As PropertyChangingEventArgs = New PropertyChangingEventArgs(String.Empty) 

    Private _PK As Integer 

    Private _ID As Integer 

    Private _BOOK_COMP As String 

    Private _GREEK As String 

    Private _DP1 As Decimal 

    Private _DP2 As Decimal 

    Private _DP3 As Decimal 

    Private _DP4 As Decimal 

    Private _DP5 As Decimal 

    Private _DP6 As Decimal 

    Private _DP7 As Decimal 

    Private _DP8 As Decimal 

    Private _DP9 As Decimal 

    Private _DP10 As Decimal 

    Private _DP11 As Decimal 

    Private _DP12 As Decimal 

    Private _DP13 As Decimal 

    Private _DP14 As Decimal 

    Private _DP15 As Decimal 

    Private _DP16 As Decimal 

    Private _DP17 As Decimal 

    Private _DP18 As Decimal 

    Private _DP19 As Decimal 

    Private _DP20 As Decimal 

    Private _DP21 As Decimal 

    Private _BOOK As EntityRef(Of BOOK) 

Answer 1

основе именования в Entity Framework колоннах с Id имя считаются Id, вероятно, вы с этой проблемой. Попробуйте изменить имя идентификатора поля.