[Débutant] Lancer une procédure Oracle avec un Object Type en paramètre

Finalement, j'ai réussi à réaliser mon exemple, et même avec 2 propriétés dans l'Object Type.
En fait, il manquait une classe implémentant IOracleCustomTypeFactory. Et j'ai ajouté la gestion de NULL

Si ça intéresse quelqu'un, voici le code complet qui marche.
Code:
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ORACLE :
create or replace TYPE zzz_obj_ville AS OBJECT ( code_postal varchar2(5), ville varchar2(200)) not final;
create Table zzz_tab_ville ( code_postal varchar2(5), ville varchar2(200));
create or replace procedure zzz_procedure ( pin_ville in zzz_obj_ville )
is
begin
   insert into zzz_tab_ville values ( pin_ville.code_postal, pin_ville.ville);
   commit;
end;
 
*******************************************************************
VB.NET:
 
Imports Oracle.DataAccess.Client
Imports Oracle.DataAccess.Types
 
Public Class clsTest
    Implements IOracleCustomType, INullable
 
    Private m_IsNull As Boolean
    Private m_CodePostal As OracleString
    Private m_Ville As String
 
    <OracleObjectMappingAttribute("CODE_POSTAL")> _
    Public Overridable Property CodePostal() As OracleString
        Get
            Return m_CodePostal
        End Get
        Set(value As OracleString)
            m_CodePostal = value
        End Set
    End Property
 
    <OracleObjectMappingAttribute("VILLE")> _
    Public Overridable Property Ville() As String
        Get
            Return m_Ville
        End Get
        Set(value As String)
            m_Ville = value
        End Set
    End Property
 
    Public Sub FromCustomObject(con As OracleConnection, pUdt As IntPtr) Implements IOracleCustomType.FromCustomObject
        OracleUdt.SetValue(con, pUdt, "CODE_POSTAL", Me.CodePostal)
        OracleUdt.SetValue(con, pUdt, "VILLE", Me.Ville)
    End Sub
 
    Public Sub ToCustomObject(con As OracleConnection, pUdt As IntPtr) Implements IOracleCustomType.ToCustomObject
        'The ToCustomObject method is used to initialize a custom object from the 
        'specified Oracle 
        'Object or Collection by retrieving attribute or element values 
        'respectively through the OracleUdt.GetValue method.
 
        Me.CodePostal = DirectCast(OracleUdt.GetValue(con, pUdt, "CODE_POSTAL"), OracleString)
        Me.Ville = OracleUdt.GetValue(con, pUdt, "VILLE").ToString
    End Sub
 
    Public ReadOnly Property IsNull As Boolean Implements INullable.IsNull
        Get
            Return Me.m_IsNull
        End Get
    End Property
 
    Public Shared ReadOnly Property Null() As clsTest
        Get
            Dim obj As New clsTest()
            obj.m_IsNull = True
            Return obj
        End Get
    End Property
 
    Public Overrides Function ToString() As String
        ' TODO : Return a string that represents the current object
        Return ""
    End Function
 
    Public Shared Function Parse(str As String) As clsTest
        ' TODO : Add code needed to parse the string and get the object represented by the string
        Return New clsTest()
    End Function
 
End Class
 
<OracleCustomTypeMappingAttribute("ZZZ_OBJ_VILLE")> _
Public Class clsTestFactory
    Implements IOracleCustomTypeFactory
 
    Public Function CreateObject() As IOracleCustomType Implements IOracleCustomTypeFactory.CreateObject
        Dim obj As New clsTest()
        Return obj
    End Function
End Class
 
************************
' Code appelant
 
Dim MonTest As New clsTest()
MonTest.CodePostal = "cp"
MonTest.Ville = "ville"
 
Dim cmdProcedure As OracleCommand = New OracleCommand
 
Try
    With cmdProcedure
        .Connection = ...
        .CommandType = CommandType.StoredProcedure
        .CommandText = "<user proprio>.zzz_procedure"
 
        Dim param As OracleParameter = New OracleParameter
        param.OracleDbType = OracleDbType.Object
        param.Direction = ParameterDirection.Input
        ' Note: The UdtTypeName is case-senstive
        param.UdtTypeName = "<user proprio>.ZZZ_OBJ_VILLE"
        param.Value = MonTest
        cmdProcedure.Parameters.Add(param)
 
    End With
 
    cmdProcedure.ExecuteNonQuery()
 
Catch oraex As OracleException
    ...
 
Catch ex As Exception
     ...
End Try