dotnet interop: Hi everyone,

I'm getting the following messages while trying to open a .tlb file I'm
generating from VS2005...

Msg1:
MkParseDisplayName(...
""I:\DEV\CLA_Logging\CLA_Logging\bin\Release\CLA_Logging.tlb""...) failed.
Invalid syntax
MK_E_SYNTAX($800401E4)

Msg2:
The command line
("I:\DEV\CLA_Logging\CLA_Logging\bin\Release\CLA_Logging.tlb") does not
contain a valid
persistent OLE object, ProgID, or Type Library file.
Error loading type library /DLL.
TYPE_E_CANTLOADLIBRARY ($80029C4A)

I have added a program id using the following attribute...

<ProgId("CLA_Logging.ComLogging")> _



This attribute is above my ComLogging class that inherits from Logging
class.

Can anyone help me with this issue?

TIA JerryM

Hi Jerry,

Do you mean that after you added the ProgId attribute, the oleview is no
longer able to view the type library? Does the type library work when
referenced by VB6 project?

Regards,
Walter Wang (wawang@online.microsoft.com, remove 'online.')
Microsoft Online Community Support

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Walter,

Yes, I'm still getting this error after I added the prog id. I was getting
errors before and after adding the prog id. My current code is below...

<Guid("26014480-5D35-49ed-B83C-1B862BF92517")> _

<InterfaceType(ComInterfaceType.InterfaceIsIDispatch)> _

Public Interface ILoggingEvents

<DispId(1)> _

Sub LogExitDisplayLoggingWindow()

<DispId(2)> _

Sub LogErrorOccurred(ByVal outEx As Exception)

End Interface



<Guid("542FA6CF-F2C8-46d3-8601-EF370BBEF146")> _

<InterfaceType(ComInterfaceType.InterfaceIsIDispatch)> _

Public Interface ILogging

Property LogToFile() As Boolean

Property LogToScreen() As Boolean

End Interface



#End Region



<Guid("64439B0F-D1BF-43d7-BCD9-BA908BF2CCF6")> _

<ClassInterface(ClassInterfaceType.None)> _

<ProgId("CLA_Logging.Logging")> _

<ComSourceInterfaces(GetType(ILoggingEvents))> _

Public Class Logging

Implements IDisposable

Implements ILogging



Public Delegate Sub LogExitDisplayLoggingWindowHandler()

Public Delegate Sub LogErrorOccurredHandler(ByVal outEx As Exception)

Public Event LogExitDisplayLoggingWindow As
LogExitDisplayLoggingWindowHandler

Public Event LogErrorOccurred As LogErrorOccurredHandler



Public Sub New()

Try

If m_formInstance Is Nothing Then

m_formInstance = New frmLogDisplay()

m_formInstance.ParentLogging = Me

End If

Catch ex As Exception

ProcessException(ex)

End Try

End Sub



Public Property LogToFile() As Boolean Implements ILogging.LogToFile

Private Get

Try

Return m_LogToFile

Catch ex As Exception

ProcessException(ex)

End Try

End Get

Set(ByVal value As Boolean)

Try

m_LogToFile = value

Catch ex As Exception

ProcessException(ex)

End Try

End Set

End Property



Public Property LogToScreen() As Boolean Implements ILogging.LogToScreen

Private Get

Try

Return m_LogToScreen

Catch ex As Exception

ProcessException(ex)

End Try

End Get

Set(ByVal value As Boolean)

Try

m_LogToScreen = value

Catch ex As Exception

ProcessException(ex)

End Try

End Set

End Property



'*** Other code not shown.

End Class




Great Links:



(Part 1)

http://www.15seconds.com/issue/040721.htm



(Part 2)...

http://www.15seconds.com/issue/060309.htm



http://www.codeproject.com/dotnet/cominterop.asp

....(See Part 2)



Yes Walter I am all over the place on this COM InterOp topic. It would be
nice to have one good source of docuemntation and code examples of how to
use these attributes and when and where each one is needed, etc... It still
blows my mind that I can't inherit from a base class and for my derived
class see my public methods, properties and event when exposed via COM
Attributes. Maybe after I have a working module of the proper and best way
to do COM InterOp I a can explore the "Inheritance Option".



* See newest post named: "COM InterOp - Interace ?s" for continued
descussion's on this topic.


Thanks! JerryM

Hi Jerry,

Using your code from your other post:

Imports System
Imports System.Runtime.InteropServices
Imports System.Runtime

<Guid("26014480-5D35-49ed-B83C-1B862BF92517")> _
<InterfaceType(ComInterfaceType.InterfaceIsIDispatch)> _
Public Interface ILoggingEvents
<DispId(1)> _
Sub LogExitDisplayLoggingWindow()
<DispId(2)> _
Sub LogErrorOccurred(ByVal outEx As Exception)
End Interface

<Guid("542FA6CF-F2C8-46d3-8601-EF370BBEF146")> _
<InterfaceType(ComInterfaceType.InterfaceIsIDispatch)> _
Public Interface ILogging
Property LogToFile() As Boolean
Sub Log(ByVal text As String)
End Interface

<Guid("64439B0F-D1BF-43d7-BCD9-BA908BF2CCF6")> _
<ClassInterface(ClassInterfaceType.None)> _
<ProgId("CLA_Logging.Logging")> _
<ComSourceInterfaces(GetType(ILoggingEvents))> _
Public Class Logging
Implements ILogging
Implements IDisposable

Public Delegate Sub LogExitDisplayLoggingWindowHandler()
Public Delegate Sub LogErrorOccurredHandler(ByVal outEx As Exception)

Public Event LogExitDisplayLoggingWindow As
LogExitDisplayLoggingWindowHandler
Public Event LogErrorOccurred As LogErrorOccurredHandler

Private m_LogToFile As Boolean

Public Sub New()

End Sub

Public Property LogToFile() As Boolean Implements ILogging.LogToFile
Private Get
Return m_LogToFile
End Get

Set(ByVal value As Boolean)
m_LogToFile = value
End Set
End Property

Public Sub Log(ByVal text As String) Implements ILogging.Log
If String.IsNullOrEmpty(text) Then
Throw New ArgumentException("text cannot be empty")
End If
End Sub

Public Sub Dispose() Implements IDisposable.Dispose

End Sub
End Class


The generated .tlb file loads correctly by OleView.


Regards,
Walter Wang (wawang@online.microsoft.com, remove 'online.')
Microsoft Online Community Support

==================================================
When responding to posts, please "Reply to Group" via your newsreader so
that others may learn and benefit from your issue.
==================================================

This posting is provided "AS IS" with no warranties, and confers no rights.

Walter, yes I understand that you have this working. I may have some thing
missing on my workstation. I'm still getting the same errors.

If anyone else has seen these errors please let me know so I can fix this on
my machine.

TIA, JerryM