เพิ่มข้อมูลแล้วขึ้นerror You cannot add or change a record because a related record is required in table

 Private Sub BNAdd_Click(sender As Object, e As EventArgs) Handles BNAdd.Click

        If CBITPlanndList.Text = "" Or CT.Text = "" Or CBItemNo.Text = "" Or txtDate.Text = "" Or txtQty.Text = "" Or CBModel.Text = "" Or CBStaff.Text = "" Or txtRemark.Text = "" Or txtOrderedTimes.Text = "" Or txtTransContractorID.Text = "" Then
            MessageBox.Show("กรุณาใส่ข้อมูล")
        Else
            Dim str = txtDate.Text
            Dim strArr() As String
            strArr = str.Split(CChar(" "))
            Dim TimeDate As String = strArr(0)
            Dim Result As MsgBoxResult
            Result = CType(MessageBox.Show("คุณต้องการบันทึกข้อมูลใช่หรือไม่", "คำเตือน", MessageBoxButtons.YesNo), MsgBoxResult)
            If Result = MsgBoxResult.Yes Then
                ' MessageBox.Show(txtCVNo.Text)
                Dim cmd As OleDbCommand = Nothing

                sql_search = " SELECT TOP 1 * from  IT_TransContractor"
                Dim sqlwhere As String = " where (IT_TransContractor.PlannedListID LIKE '" & CBITPlanndList.Text & "') and (IT_TransContractor.ContractorID LIKE '" & CT.Text & "') and(IT_TransContractor.ItemNo LIKE '" & CBItemNo.Text & "')order by OrderedTimes desc"

                sqlemp = sql_search & sqlwhere
                da2 = New OleDbDataAdapter(sqlemp, conn)
                da2.Fill(ds2, "IT_PlannedList")
                dt2 = ds2.Tables("IT_PlannedList")
                ' MessageBox.Show(66)
                txtOrderedTimes.DataBindings.Add(New Binding("text", dt2, "OrderedTimes"))
                Dim txtOrderedTimes2 As String = txtOrderedTimes.Text + 1

                sql_search2 = " SELECT TOP 1 * from  IT_TransContractor"
                Dim sqlwhere2 As String = " order by TransContractorID desc"
                sqlemp2 = sql_search2 & sqlwhere2
                ' MessageBox.Show(sqlemp2)
                da3 = New OleDbDataAdapter(sqlemp2, conn)
                da3.Fill(ds3, "IT_TransContractor")
                dt3 = ds3.Tables("IT_TransContractor")
                ' MessageBox.Show(77)
                txtTransContractorID.DataBindings.Add(New Binding("text", dt3, "TransContractorID"))
                Dim txtTransContractorID2 As Integer = txtTransContractorID.Text + 1


                MessageBox.Show(txtDate.Text)
                Dim NumMonthS As String = condata.CheckData(txtDate.Text)
                Dim T = txtDate.Text
                Dim TArr() As String
                TArr = T.Split(CChar("/"))
                Dim txt3 As Integer = strArr(2) - 543
                MessageBox.Show(txt3)
                Dim txt1 As String = strArr(0) & "/" & NumMonthS & "/" & txt3
                ' Dim txt1 As String = strArr(0) & "/" & NumMonthS & "/" & strArr(2)
                MessageBox.Show(txt1)
                condata.addITEquipmentAwaiting(PlannedListID:=CBITPlanndList.Text, ContractorID:=CT.Text, ItemNo:=CBItemNo.Text, ReceivedDate:=txt1, ReceivedQty:=txtQty.Text, ModelID:=model.Text, ApprovedStaffPosition:=CBStaff.Text, Remark:=txtRemark.Text, OrderedTimes:=txtOrderedTimes2, TransContractorID:=txtTransContractorID2)


                MessageBox.Show("ข้อมูลถูกบันทึกเรียบร้อย")
                'MessageBox.Show(TextBox1.Text)

            ElseIf Result = MsgBoxResult.No Then
                MessageBox.Show("การบันทึก ถูกยกเลิก")
            End If

        End If
    End Sub

 Public Sub addITEquipmentAwaiting(ByVal PlannedListID As Integer, ByVal ContractorID As Integer, ByVal ItemNo As String, ByVal ReceivedDate As String, ByVal ReceivedQty As Integer, ByVal ModelID As Integer, ByVal ApprovedStaffPosition As Integer, ByVal Remark As String, ByVal OrderedTimes As Integer, ByVal TransContractorID As Integer)

     

        Dim dt As DataTable
        Dim dr As DataRow
        Dim da As New OleDbDataAdapter
        Dim ds As New DataSet
        Connect()

        Dim sqlAgencies As String
        sqlAgencies = "Select * From IT_TransContractor"



        da = New OleDbDataAdapter(sqlAgencies, conn)
        da.Fill(ds, "IT_TransContractor")


        dt = ds.Tables("IT_TransContractor")


        dr = dt.NewRow() '<-------- เพิ่มแถมใหม่ในObj dt
        dr("TransContractorID") = TransContractorID
        dr("PlannedListID") = PlannedListID
        dr("ContractorID") = ContractorID
        dr("ItemNo") = ItemNo
        dr("ReceivedDate") = ReceivedDate

        dr("ReceivedQty") = ReceivedQty
        dr("ModelID") = ModelID
        dr("ApprovedStaffPosition") = ApprovedStaffPosition
        dr("Remark") = Remark
        dr("OrderedTimes") = OrderedTimes


        dt.Rows.Add(dr)               '<-------- เพิ่มข้อมูลใหม่ในObj dt

        Dim combd As New OleDbCommandBuilder(da)
        da.Update(ds, "IT_TransContractor")  ' <---------------------------------ERROR ตรงนี้อ่ะครับ ตามรูปแรก
        ds.AcceptChanges()
        da.Fill(ds, "IT_TransContractor")

    End Sub