Hi,
I'm writting a COM Class in VB.NET to be used in a VB6 project (Tired of
the VB6 hassles with cloning and serializing an object). All my
classes I need cloneable/serializable are now in a VB.NET class that exposes
those objects to COM perfectly. However I ran into a problem because some
of these objects requires a Collection. When I compile this project with
the VB.NET Collection exposed for a property, I get a compile time error
that VB cann't find Type Library "Microsoft.Visu alBasic". I even tried
using VBA.CollectionC lass, but everytime I try to create a new object in
VB6, the object stays equal to nothing (Doesn't create).
Ben Hannon
Williamsport, PA
16  2585 
Hi Ben,
I agree with Mattias's suggestion.
The problem may be caused by a known issue when passing a collection from a
.NET-Connected Application to Visual Basic 6.0 Components.
Did Mattias's link help you?
If you have any related question, please feel free to let me know.
Regards,
Peter Huang
Microsoft Online Partner Support
Get Secure! www.microsoft.com/security
This posting is provided "as is" with no warranties and confers no rights.
-------------------- From: "Ben Hannon" <ha****@brodart .com>
Subject: VB.NET COLLECTION VB6 COM
Date: Tue, 14 Oct 2003 09:30:54 -0400
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Hi,
I'm writting a COM Class in VB.NET to be used in a VB6 project (Tired of
the VB6 hassles with cloning and serializing an object). All my
classes I need cloneable/serializable are now in a VB.NET class that
exposesthose objects to COM perfectly. However I ran into a problem because some
of these objects requires a Collection. When I compile this project with
the VB.NET Collection exposed for a property, I get a compile time error
that VB cann't find Type Library "Microsoft.Visu alBasic". I even tried
using VBA.CollectionC lass, but everytime I try to create a new object in
VB6, the object stays equal to nothing (Doesn't create).
Ben Hannon
Williamsport , PA
Actually, those links helped me decide to kill trying to pass the VBA
Collection since I can't serialize it. What I decided to do instead is to
create a VB.NET collection with the ArrayList class and expose the methods
needed for COM Interop. Everything works perfectly when running the Class
as a Console App (clone works perfectly). However, when I compile it as a
DLL and try to use it in my VB6 app, when I try to clone an object I get the
error "Cannot find the assembly TartanCls, Version=1.0.138 4.16492,
Culture=neutral , PublicKeyToken= null." Any ideas?
Ben Hannon
"Ben Hannon" <ha****@brodart .com> wrote in message
news:eQ******** *****@TK2MSFTNG P10.phx.gbl... Hi,
I'm writting a COM Class in VB.NET to be used in a VB6 project (Tired of
the VB6 hassles with cloning and serializing an object). All my
classes I need cloneable/serializable are now in a VB.NET class that
exposes those objects to COM perfectly. However I ran into a problem because some
of these objects requires a Collection. When I compile this project with
the VB.NET Collection exposed for a property, I get a compile time error
that VB cann't find Type Library "Microsoft.Visu alBasic". I even tried
using VBA.CollectionC lass, but everytime I try to create a new object in
VB6, the object stays equal to nothing (Doesn't create).
Ben Hannon
Williamsport, PA
Actually, those links helped me decide to kill trying to pass the VBA
Collection since I can't serialize it. What I decided to do instead is to
create a VB.NET collection with the ArrayList class and expose the methods
needed for COM Interop. Everything works perfectly when running the Class
as a Console App (clone works perfectly). However, when I compile it as a
DLL and try to use it in my VB6 app, when I try to clone an object I get the
error "Cannot find the assembly TartanCls, Version=1.0.138 4.16492,
Culture=neutral , PublicKeyToken= null." Any ideas?
Ben Hannon
"Ben Hannon" <ha****@brodart .com> wrote in message
news:eQ******** *****@TK2MSFTNG P10.phx.gbl... Hi,
I'm writting a COM Class in VB.NET to be used in a VB6 project (Tired of
the VB6 hassles with cloning and serializing an object). All my
classes I need cloneable/serializable are now in a VB.NET class that
exposes those objects to COM perfectly. However I ran into a problem because some
of these objects requires a Collection. When I compile this project with
the VB.NET Collection exposed for a property, I get a compile time error
that VB cann't find Type Library "Microsoft.Visu alBasic". I even tried
using VBA.CollectionC lass, but everytime I try to create a new object in
VB6, the object stays equal to nothing (Doesn't create).
Ben Hannon
Williamsport, PA
I did a little more looking into this bug and discovered it is occurring when I try
to deserialize my Memory Stream:
Public Function CloneMe(ByVal Data As Object) As Object
Dim myMemoryStream As New System.IO.Memor yStream
Dim MyFormatter As New BinaryFormatter
Try
MsgBox("Before Serialization. " & vbCrLf & vbCrLf & "Memory Stream Capacity: " & myMemoryStream. Capacity)
MyFormatter.Ser ialize(myMemory Stream, Data)
MsgBox("After Serialization. " & vbCrLf & vbCrLf & "Memory Stream Capacity: " & myMemoryStream. Capacity & vbCrLf & "Memory Stream Length: " & myMemoryStream. Length & vbCrLf & "Memory Stream Position: " & myMemoryStream. Position)
myMemoryStream. Seek(0, SeekOrigin.Begi n)
MsgBox("After Reset. " & vbCrLf & vbCrLf & "Memory Stream Capacity: " & myMemoryStream. Capacity & vbCrLf & "Memory Stream Length: " & myMemoryStream. Length & vbCrLf & "Memory Stream Position: " & myMemoryStream. Position)
***CloneMe = MyFormatter.Des erialize(myMemo ryStream)
MsgBox("After Deserialization . " & vbCrLf & vbCrLf & "Memory Stream Capacity: " & myMemoryStream. Capacity & vbCrLf & "Memory Stream Length: " & myMemoryStream. Length & vbCrLf & "Memory Stream Position: " & myMemoryStream. Position)
myMemoryStream. Close()
myMemoryStream = Nothing
Catch
MsgBox("Error occurred in sub CloneMe." & vbCrLf & vbCrLf & Err.Description , MsgBoxStyle.Cri tical)
CloneMe = Nothing
End Try
End Function
The red/asterisked line above is the line that generates this error.
Ben Hannon
"Ben Hannon" <ha****@brodart .com> wrote in message news:eS******** ******@tk2msftn gp13.phx.gbl... Actually, those links helped me decide to kill trying to pass the VBA
Collection since I can't serialize it. What I decided to do instead is to
create a VB.NET collection with the ArrayList class and expose the methods
needed for COM Interop. Everything works perfectly when running the Class
as a Console App (clone works perfectly). However, when I compile it as a
DLL and try to use it in my VB6 app, when I try to clone an object I get the
error "Cannot find the assembly TartanCls, Version=1.0.138 4.16492,
Culture=neutral , PublicKeyToken= null." Any ideas?
Ben Hannon
"Ben Hannon" <ha****@brodart .com> wrote in message
news:eQ******** *****@TK2MSFTNG P10.phx.gbl... Hi,
I'm writting a COM Class in VB.NET to be used in a VB6 project (Tired of
the VB6 hassles with cloning and serializing an object). All my
classes I need cloneable/serializable are now in a VB.NET class that
exposes those objects to COM perfectly. However I ran into a problem because some
of these objects requires a Collection. When I compile this project with
the VB.NET Collection exposed for a property, I get a compile time error
that VB cann't find Type Library "Microsoft.Visu alBasic". I even tried
using VBA.CollectionC lass, but everytime I try to create a new object in
VB6, the object stays equal to nothing (Doesn't create).
Ben Hannon
Williamsport, PA
Hi Ben,
Based on my understanding, you want to pass a VB6 object to the CloneMe
method to be serialized.
I think it is not a proper method to do so.
Since when interoperation between VB and .NET, the Object passed from VB to
.NET is an COM object.
The serialization implement between COM and .NET is different, that is to
say if you serialize a COM object
in .NET, the .NET framework will not know how to serialize the object.
In my test the error will occur at the line below.
MyFormatter.Ser ialize(myMemory Stream, Data)
Because .NET framework do not know how to serialize the Object Data.
This is my sample code, is that what you are doing in your code?
If you have any question, please feel free to let me know.
[VB6]
Private Sub Command1_Click( )
Dim so As New ClassLibrary3.C lass1
Text1.Text = "1000"
Dim obj As Object
obj = so.CloneMe(ByVa l Text1)
MsgBox obj.Text
End Sub
[ClassLibrary3.C lass1]
Imports System.Runtime. Serialization.F ormatters.Binar y
Imports System.IO
Imports System.Runtime. InteropServices
<ClassInterface (ClassInterface Type.AutoDual)> _
Public Class Class1
Public Function CloneMe(ByVal Data As Object) As Object
Dim myMemoryStream As New System.IO.Memor yStream()
Dim MyFormatter As New BinaryFormatter ()
Try
MsgBox("Before Serialization. " & vbCrLf & vbCrLf & "Memory
Stream Capacity: " & myMemoryStream. Capacity)
MyFormatter.Ser ialize(myMemory Stream, Data)
MsgBox("After Serialization. " & vbCrLf & vbCrLf & "Memory
Stream Capacity: " & myMemoryStream. Capacity & vbCrLf & "Memory Stream
Length: " & myMemoryStream. Length & vbCrLf & "Memory Stream Position: " &
myMemoryStream. Position)
myMemoryStream. Seek(0, SeekOrigin.Begi n)
MsgBox("After Reset. " & vbCrLf & vbCrLf & "Memory Stream
Capacity: " & myMemoryStream. Capacity & vbCrLf & "Memory Stream Length: " &
myMemoryStream. Length & vbCrLf & "Memory Stream Position: " &
myMemoryStream. Position)
CloneMe = MyFormatter.Des erialize(myMemo ryStream)
MsgBox("After Deserialization . " & vbCrLf & vbCrLf & "Memory
Stream Capacity: " & myMemoryStream. Capacity & vbCrLf & "Memory Stream
Length: " & myMemoryStream. Length & vbCrLf & "Memory Stream Position: " &
myMemoryStream. Position)
myMemoryStream. Close()
myMemoryStream = Nothing
Catch
MsgBox("Error occurred in sub CloneMe." & vbCrLf & vbCrLf &
Err.Description , MsgBoxStyle.Cri tical)
CloneMe = Nothing
End Try
End Function
End Class
BTW
Are your VB.NET dll named as TartanCls?
If so, you may need to place it in the same directory as the VB6 Exe file
or you can use the command line below to register the VB.NET classlibrary.
regasm /codebase ClassLibrary3.d ll
Regards,
Peter Huang
Microsoft Online Partner Support
Get Secure! www.microsoft.com/security
This posting is provided "as is" with no warranties and confers no rights.
-------------------- From: "Ben Hannon" <ha****@brodart .com>
References: <eQ************ *@TK2MSFTNGP10. phx.gbl>
<eS************ **@tk2msftngp13 .phx.gbl>Subject: Re: VB.NET COLLECTION VB6 COM
Date: Thu, 16 Oct 2003 11:59:55 -0400
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X-Tomcat-NG: microsoft.publi c.dotnet.langua ges.vb
I did a little more looking into this bug and discovered it is occurring
when I tryto deserialize my Memory Stream:
Public Function CloneMe(ByVal Data As Object) As Object
Dim myMemoryStream As New System.IO.Memor yStream
Dim MyFormatter As New BinaryFormatter
Try
MsgBox("Befo re Serialization. " & vbCrLf & vbCrLf & "Memory Stream
Capacity: " & myMemoryStream. Capacity)MyFormatter.Se rialize(myMemor yStream, Data)
MsgBox("Afte r Serialization. " & vbCrLf & vbCrLf & "Memory Stream
Capacity: " & myMemoryStream. Capacity & vbCrLf & "Memory Stream Length: " &
myMemoryStream. Length & vbCrLf & "Memory Stream Position: " &
myMemoryStream. Position)myMemoryStream .Seek(0, SeekOrigin.Begi n)
MsgBox("Afte r Reset. " & vbCrLf & vbCrLf & "Memory Stream Capacity: " &
myMemoryStream. Capacity & vbCrLf & "Memory Stream Length: " &
myMemoryStream. Length & vbCrLf & "Memory Stream Position: " &
myMemoryStream. Position)***CloneMe = MyFormatter.Des erialize(myMemo ryStream)
MsgBox("Afte r Deserialization . " & vbCrLf & vbCrLf & "Memory Stream
Capacity: " & myMemoryStream. Capacity & vbCrLf & "Memory Stream Length: " &
myMemoryStream. Length & vbCrLf & "Memory Stream Position: " &
myMemoryStream. Position)myMemoryStream .Close()
myMemoryStre am = Nothing
Catch
MsgBox("Erro r occurred in sub CloneMe." & vbCrLf & vbCrLf &
Err.Description , MsgBoxStyle.Cri tical)CloneMe = Nothing
End Try
End Function
The red/asterisked line above is the line that generates this error.
Ben Hannon
"Ben Hannon" <ha****@brodart .com> wrote in message
news:eS******** ******@tk2msftn gp13.phx.gbl... Actually, those links helped me decide to kill trying to pass the VBA
Collection since I can't serialize it. What I decided to do instead is
to create a VB.NET collection with the ArrayList class and expose the
methods needed for COM Interop. Everything works perfectly when running the
Class as a Console App (clone works perfectly). However, when I compile it as a
DLL and try to use it in my VB6 app, when I try to clone an object I get
the error "Cannot find the assembly TartanCls, Version=1.0.138 4.16492,
Culture=neutral , PublicKeyToken= null." Any ideas?
Ben Hannon
"Ben Hannon" <ha****@brodart .com> wrote in message
news:eQ******** *****@TK2MSFTNG P10.phx.gbl... > Hi,
>
> I'm writting a COM Class in VB.NET to be used in a VB6 project
(Tired of > the VB6 hassles with cloning and serializing an object). All my
> classes I need cloneable/serializable are now in a VB.NET class that
exposes > those objects to COM perfectly. However I ran into a problem because
some > of these objects requires a Collection. When I compile this project
with > the VB.NET Collection exposed for a property, I get a compile time
error > that VB cann't find Type Library "Microsoft.Visu alBasic". I even
tried > using VBA.CollectionC lass, but everytime I try to create a new object
in > VB6, the object stays equal to nothing (Doesn't create).
>
> Ben Hannon
> Williamsport, PA
>
>
Peter,
Actually, it's not a VB6 object. The classes that will be
serialized/Cloned are written in VB.NET and compiled as a DLL with COM
Interop. All of the serialization is done internally in the DLL so that the
..NET runtime is being used, not VB6 runtime and is only serializing the .NET
class (nothing passed from VB6). Serializing the object works perfectly,
the part that barfs is when I try to deserialize the memorystream that was
just serialized along with Deserializing a binary file. Deserialize errors:
"Cannot find the assembly TartanCls, Version=1.0.138 4.16492,
Culture=neutral , PublicKeyToken= null." I added some more code in my DLL to
loop through the AppDomain.Curre ntDomain.GetAss emblies and msgbox the
assembly info to check if the assembly was loaded and it was, however when I
tried
Path.GetDirecto ryName(System.R eflection.Assbl y.GetEntryAssem bly().Location)
to get the DLL's path, that errored with "Object reference not set to an
instance of an object" which tells me that the current loaded assembly it
not defaulted at that point. Looks like I may have to load the assembly a
second time before deserializing? All of this code however works when
compiled as a .NET Console App. My next thing I'm gonna try is copying the
DLL/TLB to my VB6 app and reference it to there, maybe that will fix the
problem. If you would like to see my code, I can post it.
Ben
"Peter Huang [MSFT]" <v-******@online.m icrosoft.com> wrote in message
news:sI******** ******@cpmsftng xa06.phx.gbl... Hi Ben,
Based on my understanding, you want to pass a VB6 object to the CloneMe
method to be serialized.
I think it is not a proper method to do so.
Since when interoperation between VB and .NET, the Object passed from VB
to NET is an COM object.
The serialization implement between COM and .NET is different, that is to
say if you serialize a COM object
in .NET, the .NET framework will not know how to serialize the object.
In my test the error will occur at the line below.
MyFormatter.Ser ialize(myMemory Stream, Data)
Because .NET framework do not know how to serialize the Object Data.
This is my sample code, is that what you are doing in your code?
If you have any question, please feel free to let me know.
[VB6]
Private Sub Command1_Click( )
Dim so As New ClassLibrary3.C lass1
Text1.Text = "1000"
Dim obj As Object
obj = so.CloneMe(ByVa l Text1)
MsgBox obj.Text
End Sub
[ClassLibrary3.C lass1]
Imports System.Runtime. Serialization.F ormatters.Binar y
Imports System.IO
Imports System.Runtime. InteropServices
<ClassInterface (ClassInterface Type.AutoDual)> _
Public Class Class1
Public Function CloneMe(ByVal Data As Object) As Object
Dim myMemoryStream As New System.IO.Memor yStream()
Dim MyFormatter As New BinaryFormatter ()
Try
MsgBox("Before Serialization. " & vbCrLf & vbCrLf & "Memory
Stream Capacity: " & myMemoryStream. Capacity)
MyFormatter.Ser ialize(myMemory Stream, Data)
MsgBox("After Serialization. " & vbCrLf & vbCrLf & "Memory
Stream Capacity: " & myMemoryStream. Capacity & vbCrLf & "Memory Stream
Length: " & myMemoryStream. Length & vbCrLf & "Memory Stream Position: " &
myMemoryStream. Position)
myMemoryStream. Seek(0, SeekOrigin.Begi n)
MsgBox("After Reset. " & vbCrLf & vbCrLf & "Memory Stream
Capacity: " & myMemoryStream. Capacity & vbCrLf & "Memory Stream Length: "
& myMemoryStream. Length & vbCrLf & "Memory Stream Position: " &
myMemoryStream. Position)
CloneMe = MyFormatter.Des erialize(myMemo ryStream)
MsgBox("After Deserialization . " & vbCrLf & vbCrLf & "Memory
Stream Capacity: " & myMemoryStream. Capacity & vbCrLf & "Memory Stream
Length: " & myMemoryStream. Length & vbCrLf & "Memory Stream Position: " &
myMemoryStream. Position)
myMemoryStream. Close()
myMemoryStream = Nothing
Catch
MsgBox("Error occurred in sub CloneMe." & vbCrLf & vbCrLf &
Err.Description , MsgBoxStyle.Cri tical)
CloneMe = Nothing
End Try
End Function
End Class
BTW
Are your VB.NET dll named as TartanCls?
If so, you may need to place it in the same directory as the VB6 Exe file
or you can use the command line below to register the VB.NET classlibrary.
regasm /codebase ClassLibrary3.d ll
Regards,
Peter Huang
Microsoft Online Partner Support
Get Secure! www.microsoft.com/security
This posting is provided "as is" with no warranties and confers no rights.
--------------------From: "Ben Hannon" <ha****@brodart .com>
References: <eQ************ *@TK2MSFTNGP10. phx.gbl> <eS************ **@tk2msftngp13 .phx.gbl>Subject: Re: VB.NET COLLECTION VB6 COM
Date: Thu, 16 Oct 2003 11:59:55 -0400
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X-Tomcat-NG: microsoft.publi c.dotnet.langua ges.vb
I did a little more looking into this bug and discovered it is occurring
when I tryto deserialize my Memory Stream:
Public Function CloneMe(ByVal Data As Object) As Object
Dim myMemoryStream As New System.IO.Memor yStream
Dim MyFormatter As New BinaryFormatter
Try
MsgBox("Befo re Serialization. " & vbCrLf & vbCrLf & "Memory Stream
Capacity: " & myMemoryStream. Capacity)MyFormatter.Se rialize(myMemor yStream, Data)
MsgBox("Afte r Serialization. " & vbCrLf & vbCrLf & "Memory Stream
Capacity: " & myMemoryStream. Capacity & vbCrLf & "Memory Stream Length: "
& myMemoryStream. Length & vbCrLf & "Memory Stream Position: " &
myMemoryStream. Position)myMemoryStream .Seek(0, SeekOrigin.Begi n)
MsgBox("Afte r Reset. " & vbCrLf & vbCrLf & "Memory Stream Capacity: " & myMemoryStream. Capacity & vbCrLf & "Memory Stream Length: " &
myMemoryStream. Length & vbCrLf & "Memory Stream Position: " &
myMemoryStream. Position)***CloneMe = MyFormatter.Des erialize(myMemo ryStream)
MsgBox("Afte r Deserialization . " & vbCrLf & vbCrLf & "Memory Stream
Capacity: " & myMemoryStream. Capacity & vbCrLf & "Memory Stream Length: "
& myMemoryStream. Length & vbCrLf & "Memory Stream Position: " &
myMemoryStream. Position)myMemoryStream .Close()
myMemoryStre am = Nothing
Catch
MsgBox("Erro r occurred in sub CloneMe." & vbCrLf & vbCrLf & Err.Description , MsgBoxStyle.Cri tical)CloneMe = Nothing
End Try
End Function
The red/asterisked line above is the line that generates this error.
Ben Hannon
"Ben Hannon" <ha****@brodart .com> wrote in message
news:eS******** ******@tk2msftn gp13.phx.gbl... Actually, those links helped me decide to kill trying to pass the VBA
Collection since I can't serialize it. What I decided to do instead is to create a VB.NET collection with the ArrayList class and expose the methods needed for COM Interop. Everything works perfectly when running the Class as a Console App (clone works perfectly). However, when I compile it as
a DLL and try to use it in my VB6 app, when I try to clone an object I
get the error "Cannot find the assembly TartanCls, Version=1.0.138 4.16492,
Culture=neutral , PublicKeyToken= null." Any ideas?
Ben Hannon
"Ben Hannon" <ha****@brodart .com> wrote in message
news:eQ******** *****@TK2MSFTNG P10.phx.gbl...
> Hi,
>
> I'm writting a COM Class in VB.NET to be used in a VB6 project (Tired of > the VB6 hassles with cloning and serializing an object). All my
> classes I need cloneable/serializable are now in a VB.NET class that
exposes
> those objects to COM perfectly. However I ran into a problem because some > of these objects requires a Collection. When I compile this project with > the VB.NET Collection exposed for a property, I get a compile time error > that VB cann't find Type Library "Microsoft.Visu alBasic". I even tried > using VBA.CollectionC lass, but everytime I try to create a new object in > VB6, the object stays equal to nothing (Doesn't create).
>
> Ben Hannon
> Williamsport, PA
>
>
Hi Ben,
If your project is somewhat large, you may post a simple sample to
demostrate what you want to do and reproduce the problem.
Based on my understanding, you want to call an method of an managed DLL,
and the method will do the clone in the DLL.
e.g.
[msnaged DLL]Imports System.Runtime. InteropServices
Imports System.Runtime. Serialization.F ormatters.Binar y
Imports System.IO
<ClassInterface (ClassInterface Type.AutoDual)> _
Public Class Class1
Private str As String
Public Property HostStr()
Get
HostStr = str
End Get
Set(ByVal Value)
str = Value
End Set
End Property
Private Function CloneMe(ByVal Data As Object) As Object
Dim myMemoryStream As New System.IO.Memor yStream
Dim MyFormatter As New BinaryFormatter
Try
MsgBox("Before Serialization. " & vbCrLf & vbCrLf & "Memory
Stream Capacity: " & myMemoryStream. Capacity)
MyFormatter.Ser ialize(myMemory Stream, Data)
MsgBox("After Serialization. " & vbCrLf & vbCrLf & "Memory
Stream Capacity: " & myMemoryStream. Capacity & vbCrLf & "Memory Stream
Length: " & myMemoryStream. Length & vbCrLf & "Memory Stream Position: " &
myMemoryStream. Position)
myMemoryStream. Seek(0, SeekOrigin.Begi n)
MsgBox("After Reset. " & vbCrLf & vbCrLf & "Memory Stream
Capacity: " & myMemoryStream. Capacity & vbCrLf & "Memory Stream Length: " &
myMemoryStream. Length & vbCrLf & "Memory Stream Position: " &
myMemoryStream. Position)
CloneMe = MyFormatter.Des erialize(myMemo ryStream)
MsgBox("After Deserialization . " & vbCrLf & vbCrLf & "Memory
Stream Capacity: " & myMemoryStream. Capacity & vbCrLf & "Memory Stream
Length: " & myMemoryStream. Length & vbCrLf & "Memory Stream Position: " &
myMemoryStream. Position)
myMemoryStream. Close()
myMemoryStream = Nothing
Catch
MsgBox("Error occurred in sub CloneMe." & vbCrLf & vbCrLf &
Err.Description , MsgBoxStyle.Cri tical)
CloneMe = Nothing
End Try
End Function
Public Function Clone()
Dim siteUri As New Uri("http://www.contoso.com/")
Dim cloneuri As Uri
cloneuri = CloneMe(siteUri )
HostStr = cloneuri.Host
End Function
End Class
[VB6]
Private Sub Command1_Click( )
Dim o As New ClassLibrary4.C lass1
Dim str As String
o.Clone
MsgBox o.HostStr
End Sub
Did I misunderstand you meaning?
If you have any related question please feel free to let me know.
Regards,
Peter Huang
Microsoft Online Partner Support
Get Secure! www.microsoft.com/security
This posting is provided "as is" with no warranties and confers no rights.
-------------------- From: "Ben Hannon" <ha****@brodart .com>
References: <eQ************ *@TK2MSFTNGP10. phx.gbl>
<eS************ **@tk2msftngp13 .phx.gbl>
<##************ **@TK2MSFTNGP10 .phx.gbl>
<sI************ **@cpmsftngxa06 .phx.gbl>Subject: Re: VB.NET COLLECTION VB6 COM
Date: Fri, 17 Oct 2003 15:01:04 -0400
Lines: 218
X-Priority: 3
X-MSMail-Priority: Normal
X-Newsreader: Microsoft Outlook Express 6.00.2800.1158
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X-Tomcat-NG: microsoft.publi c.dotnet.langua ges.vb
Peter,
Actually, it's not a VB6 object. The classes that will be
serialized/Cloned are written in VB.NET and compiled as a DLL with COM
Interop. All of the serialization is done internally in the DLL so that
the.NET runtime is being used, not VB6 runtime and is only serializing the
.NETclass (nothing passed from VB6). Serializing the object works perfectly,
the part that barfs is when I try to deserialize the memorystream that was
just serialized along with Deserializing a binary file. Deserialize
errors:"Cannot find the assembly TartanCls, Version=1.0.138 4.16492,
Culture=neutra l, PublicKeyToken= null." I added some more code in my DLL to
loop through the AppDomain.Curre ntDomain.GetAss emblies and msgbox the
assembly info to check if the assembly was loaded and it was, however when
Itried
Path.GetDirect oryName(System. Reflection.Assb ly.GetEntryAsse mbly().Location )
to get the DLL's path, that errored with "Object reference not set to an
instance of an object" which tells me that the current loaded assembly it
not defaulted at that point. Looks like I may have to load the assembly a
second time before deserializing? All of this code however works when
compiled as a .NET Console App. My next thing I'm gonna try is copying the
DLL/TLB to my VB6 app and reference it to there, maybe that will fix the
problem. If you would like to see my code, I can post it.
Ben
"Peter Huang [MSFT]" <v-******@online.m icrosoft.com> wrote in message
news:sI******* *******@cpmsftn gxa06.phx.gbl.. . Hi Ben,
Based on my understanding, you want to pass a VB6 object to the CloneMe
method to be serialized.
I think it is not a proper method to do so.
Since when interoperation between VB and .NET, the Object passed from VBto NET is an COM object.
The serialization implement between COM and .NET is different, that is to
say if you serialize a COM object
in .NET, the .NET framework will not know how to serialize the object.
In my test the error will occur at the line below.
MyFormatter.Ser ialize(myMemory Stream, Data)
Because .NET framework do not know how to serialize the Object Data.
This is my sample code, is that what you are doing in your code?
If you have any question, please feel free to let me know.
[VB6]
Private Sub Command1_Click( )
Dim so As New ClassLibrary3.C lass1
Text1.Text = "1000"
Dim obj As Object
obj = so.CloneMe(ByVa l Text1)
MsgBox obj.Text
End Sub
[ClassLibrary3.C lass1]
Imports System.Runtime. Serialization.F ormatters.Binar y
Imports System.IO
Imports System.Runtime. InteropServices
<ClassInterface (ClassInterface Type.AutoDual)> _
Public Class Class1
Public Function CloneMe(ByVal Data As Object) As Object
Dim myMemoryStream As New System.IO.Memor yStream()
Dim MyFormatter As New BinaryFormatter ()
Try
MsgBox("Before Serialization. " & vbCrLf & vbCrLf & "Memory
Stream Capacity: " & myMemoryStream. Capacity)
MyFormatter.Ser ialize(myMemory Stream, Data)
MsgBox("After Serialization. " & vbCrLf & vbCrLf & "Memory
Stream Capacity: " & myMemoryStream. Capacity & vbCrLf & "Memory Stream
Length: " & myMemoryStream. Length & vbCrLf & "Memory Stream Position: " &
myMemoryStream. Position)
myMemoryStream. Seek(0, SeekOrigin.Begi n)
MsgBox("After Reset. " & vbCrLf & vbCrLf & "Memory Stream
Capacity: " & myMemoryStream. Capacity & vbCrLf & "Memory Stream Length: "
& myMemoryStream. Length & vbCrLf & "Memory Stream Position: " &
myMemoryStream. Position)
CloneMe = MyFormatter.Des erialize(myMemo ryStream)
MsgBox("After Deserialization . " & vbCrLf & vbCrLf & "Memory
Stream Capacity: " & myMemoryStream. Capacity & vbCrLf & "Memory Stream
Length: " & myMemoryStream. Length & vbCrLf & "Memory Stream Position: " &
myMemoryStream. Position)
myMemoryStream. Close()
myMemoryStream = Nothing
Catch
MsgBox("Error occurred in sub CloneMe." & vbCrLf & vbCrLf &
Err.Description , MsgBoxStyle.Cri tical)
CloneMe = Nothing
End Try
End Function
End Class
BTW
Are your VB.NET dll named as TartanCls?
If so, you may need to place it in the same directory as the VB6 Exe file
or you can use the command line below to register the VB.NET
classlibrary. regasm /codebase ClassLibrary3.d ll
Regards,
Peter Huang
Microsoft Online Partner Support
Get Secure! www.microsoft.com/security
This posting is provided "as is" with no warranties and confers no
rights.
-------------------- >From: "Ben Hannon" <ha****@brodart .com>
>References: <eQ************ *@TK2MSFTNGP10. phx.gbl>
<eS************ **@tk2msftngp13 .phx.gbl> >Subject: Re: VB.NET COLLECTION VB6 COM
>Date: Thu, 16 Oct 2003 11:59:55 -0400
>Lines: 243
>MIME-Version: 1.0
>Content-Type: multipart/alternative;
> boundary="----=_NextPart_000_ 0092_01C393DD.0 3CE8EF0"
>X-Priority: 3
>X-MSMail-Priority: Normal
>X-Newsreader: Microsoft Outlook Express 6.00.2800.1158
>X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165
>Message-ID: <##************ **@TK2MSFTNGP10 .phx.gbl>
>Newsgroups: microsoft.publi c.dotnet.langua ges.vb
>NNTP-Posting-Host: 12.29.184.66
>Path: cpmsftngxa06.ph x.gbl!TK2MSFTNG P08.phx.gbl!TK2 MSFTNGP10.phx.g bl
>Xref: cpmsftngxa06.ph x.gbl microsoft.publi c.dotnet.langua ges.vb:147338
>X-Tomcat-NG: microsoft.publi c.dotnet.langua ges.vb
>
>I did a little more looking into this bug and discovered it is occurring
when I try >to deserialize my Memory Stream:
>Public Function CloneMe(ByVal Data As Object) As Object
>Dim myMemoryStream As New System.IO.Memor yStream
>Dim MyFormatter As New BinaryFormatter
>Try
>MsgBox("Befo re Serialization. " & vbCrLf & vbCrLf & "Memory Stream
Capacity: " & myMemoryStream. Capacity) >MyFormatter.Se rialize(myMemor yStream, Data)
>MsgBox("Afte r Serialization. " & vbCrLf & vbCrLf & "Memory Stream
Capacity: " & myMemoryStream. Capacity & vbCrLf & "Memory Stream Length: "
& myMemoryStream. Length & vbCrLf & "Memory Stream Position: " &
myMemoryStream. Position) >myMemoryStream .Seek(0, SeekOrigin.Begi n)
>MsgBox("Afte r Reset. " & vbCrLf & vbCrLf & "Memory Stream Capacity: " &
myMemoryStream. Capacity & vbCrLf & "Memory Stream Length: " &
myMemoryStream. Length & vbCrLf & "Memory Stream Position: " &
myMemoryStream. Position) >***CloneMe = MyFormatter.Des erialize(myMemo ryStream)
>MsgBox("Afte r Deserialization . " & vbCrLf & vbCrLf & "Memory Stream
Capacity: " & myMemoryStream. Capacity & vbCrLf & "Memory Stream Length: "
& myMemoryStream. Length & vbCrLf & "Memory Stream Position: " &
myMemoryStream. Position) >myMemoryStream .Close()
>myMemoryStre am = Nothing
>Catch
>MsgBox("Erro r occurred in sub CloneMe." & vbCrLf & vbCrLf &
Err.Description , MsgBoxStyle.Cri tical) >CloneMe = Nothing
>End Try
>End Function
>The red/asterisked line above is the line that generates this error.
>Ben Hannon
>"Ben Hannon" <ha****@brodart .com> wrote in message
news:eS******** ******@tk2msftn gp13.phx.gbl... >> Actually, those links helped me decide to kill trying to pass the VBA
>> Collection since I can't serialize it. What I decided to do instead
is to >> create a VB.NET collection with the ArrayList class and expose the
methods >> needed for COM Interop. Everything works perfectly when running the
Class >> as a Console App (clone works perfectly). However, when I compile it
asa >> DLL and try to use it in my VB6 app, when I try to clone an object I
get the >> error "Cannot find the assembly TartanCls, Version=1.0.138 4.16492,
>> Culture=neutral , PublicKeyToken= null." Any ideas?
>>
>> Ben Hannon
>>
>> "Ben Hannon" <ha****@brodart .com> wrote in message
>> news:eQ******** *****@TK2MSFTNG P10.phx.gbl...
>> > Hi,
>> >
>> > I'm writting a COM Class in VB.NET to be used in a VB6 project
(Tired of >> > the VB6 hassles with cloning and serializing an object). All my
>> > classes I need cloneable/serializable are now in a VB.NET class that
>> exposes
>> > those objects to COM perfectly. However I ran into a problem
because some >> > of these objects requires a Collection. When I compile this project
with >> > the VB.NET Collection exposed for a property, I get a compile time
error >> > that VB cann't find Type Library "Microsoft.Visu alBasic". I even
tried >> > using VBA.CollectionC lass, but everytime I try to create a new
object in >> > VB6, the object stays equal to nothing (Doesn't create).
>> >
>> > Ben Hannon
>> > Williamsport, PA
>> >
>> >
>>
>>
>
Peter,
This is exactly what I'm trying to do. The VB.NET DLL contains the
classes and Serialization code. I reference the DLL in VB6 and when I try
to execute the .clone method or .Load method (Loads settings from a
serialized file) I get the error that the assembly cannot be found when the
deserialize method is used. Like I said before, I looped through the
appdomain.curre ntdomain.getass emblies collection to see if the assembly was
loaded and it was. So for some odd reason, the deserialized method is not
finding it. Is there any way to force the deserialized method to use a
certain assembly?
Ben Hannon
"Peter Huang [MSFT]" <v-******@online.m icrosoft.com> wrote in message
news:2d******** ******@cpmsftng xa06.phx.gbl... Hi Ben,
If your project is somewhat large, you may post a simple sample to
demostrate what you want to do and reproduce the problem.
Based on my understanding, you want to call an method of an managed DLL,
and the method will do the clone in the DLL.
e.g.
[msnaged DLL]Imports System.Runtime. InteropServices
Imports System.Runtime. Serialization.F ormatters.Binar y
Imports System.IO
<ClassInterface (ClassInterface Type.AutoDual)> _
Public Class Class1
Private str As String
Public Property HostStr()
Get
HostStr = str
End Get
Set(ByVal Value)
str = Value
End Set
End Property
Private Function CloneMe(ByVal Data As Object) As Object
Dim myMemoryStream As New System.IO.Memor yStream
Dim MyFormatter As New BinaryFormatter
Try
MsgBox("Before Serialization. " & vbCrLf & vbCrLf & "Memory
Stream Capacity: " & myMemoryStream. Capacity)
MyFormatter.Ser ialize(myMemory Stream, Data)
MsgBox("After Serialization. " & vbCrLf & vbCrLf & "Memory
Stream Capacity: " & myMemoryStream. Capacity & vbCrLf & "Memory Stream
Length: " & myMemoryStream. Length & vbCrLf & "Memory Stream Position: " &
myMemoryStream. Position)
myMemoryStream. Seek(0, SeekOrigin.Begi n)
MsgBox("After Reset. " & vbCrLf & vbCrLf & "Memory Stream
Capacity: " & myMemoryStream. Capacity & vbCrLf & "Memory Stream Length: "
& myMemoryStream. Length & vbCrLf & "Memory Stream Position: " &
myMemoryStream. Position)
CloneMe = MyFormatter.Des erialize(myMemo ryStream)
MsgBox("After Deserialization . " & vbCrLf & vbCrLf & "Memory
Stream Capacity: " & myMemoryStream. Capacity & vbCrLf & "Memory Stream
Length: " & myMemoryStream. Length & vbCrLf & "Memory Stream Position: " &
myMemoryStream. Position)
myMemoryStream. Close()
myMemoryStream = Nothing
Catch
MsgBox("Error occurred in sub CloneMe." & vbCrLf & vbCrLf &
Err.Description , MsgBoxStyle.Cri tical)
CloneMe = Nothing
End Try
End Function
Public Function Clone()
Dim siteUri As New Uri("http://www.contoso.com/")
Dim cloneuri As Uri
cloneuri = CloneMe(siteUri )
HostStr = cloneuri.Host
End Function
End Class
[VB6]
Private Sub Command1_Click( )
Dim o As New ClassLibrary4.C lass1
Dim str As String
o.Clone
MsgBox o.HostStr
End Sub
Did I misunderstand you meaning?
If you have any related question please feel free to let me know.
Regards,
Peter Huang
Microsoft Online Partner Support
Get Secure! www.microsoft.com/security
This posting is provided "as is" with no warranties and confers no rights.
--------------------From: "Ben Hannon" <ha****@brodart .com>
References: <eQ************ *@TK2MSFTNGP10. phx.gbl> <eS************ **@tk2msftngp13 .phx.gbl>
<##************ **@TK2MSFTNGP10 .phx.gbl>
<sI************ **@cpmsftngxa06 .phx.gbl>Subject: Re: VB.NET COLLECTION VB6 COM
Date: Fri, 17 Oct 2003 15:01:04 -0400
Lines: 218
X-Priority: 3
X-MSMail-Priority: Normal
X-Newsreader: Microsoft Outlook Express 6.00.2800.1158
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Xref: cpmsftngxa06.ph x.gbl microsoft.publi c.dotnet.langua ges.vb:147794
X-Tomcat-NG: microsoft.publi c.dotnet.langua ges.vb
Peter,
Actually, it's not a VB6 object. The classes that will be
serialized/Cloned are written in VB.NET and compiled as a DLL with COM
Interop. All of the serialization is done internally in the DLL so that
the.NET runtime is being used, not VB6 runtime and is only serializing the
NETclass (nothing passed from VB6). Serializing the object works perfectly,
the part that barfs is when I try to deserialize the memorystream that
wasjust serialized along with Deserializing a binary file. Deserialize
errors:"Cannot find the assembly TartanCls, Version=1.0.138 4.16492,
Culture=neutra l, PublicKeyToken= null." I added some more code in my DLL
toloop through the AppDomain.Curre ntDomain.GetAss emblies and msgbox the
assembly info to check if the assembly was loaded and it was, however
when Itried
Path.GetDirect oryName(System. Reflection.Assb ly.GetEntryAsse mbly().Location )to get the DLL's path, that errored with "Object reference not set to an
instance of an object" which tells me that the current loaded assembly it
not defaulted at that point. Looks like I may have to load the assembly
asecond time before deserializing? All of this code however works when
compiled as a .NET Console App. My next thing I'm gonna try is copying
theDLL/TLB to my VB6 app and reference it to there, maybe that will fix the
problem. If you would like to see my code, I can post it.
Ben
"Peter Huang [MSFT]" <v-******@online.m icrosoft.com> wrote in message
news:sI******* *******@cpmsftn gxa06.phx.gbl.. . Hi Ben,
Based on my understanding, you want to pass a VB6 object to the CloneMe
method to be serialized.
I think it is not a proper method to do so.
Since when interoperation between VB and .NET, the Object passed from
VBto NET is an COM object.
The serialization implement between COM and .NET is different, that is
to say if you serialize a COM object
in .NET, the .NET framework will not know how to serialize the object.
In my test the error will occur at the line below.
MyFormatter.Ser ialize(myMemory Stream, Data)
Because .NET framework do not know how to serialize the Object Data.
This is my sample code, is that what you are doing in your code?
If you have any question, please feel free to let me know.
[VB6]
Private Sub Command1_Click( )
Dim so As New ClassLibrary3.C lass1
Text1.Text = "1000"
Dim obj As Object
obj = so.CloneMe(ByVa l Text1)
MsgBox obj.Text
End Sub
[ClassLibrary3.C lass1]
Imports System.Runtime. Serialization.F ormatters.Binar y
Imports System.IO
Imports System.Runtime. InteropServices
<ClassInterface (ClassInterface Type.AutoDual)> _
Public Class Class1
Public Function CloneMe(ByVal Data As Object) As Object
Dim myMemoryStream As New System.IO.Memor yStream()
Dim MyFormatter As New BinaryFormatter ()
Try
MsgBox("Before Serialization. " & vbCrLf & vbCrLf & "Memory
Stream Capacity: " & myMemoryStream. Capacity)
MyFormatter.Ser ialize(myMemory Stream, Data)
MsgBox("After Serialization. " & vbCrLf & vbCrLf & "Memory
Stream Capacity: " & myMemoryStream. Capacity & vbCrLf & "Memory Stream
Length: " & myMemoryStream. Length & vbCrLf & "Memory Stream Position: "
& myMemoryStream. Position)
myMemoryStream. Seek(0, SeekOrigin.Begi n)
MsgBox("After Reset. " & vbCrLf & vbCrLf & "Memory Stream
Capacity: " & myMemoryStream. Capacity & vbCrLf & "Memory Stream Length:
"& myMemoryStream. Length & vbCrLf & "Memory Stream Position: " &
myMemoryStream. Position)
CloneMe = MyFormatter.Des erialize(myMemo ryStream)
MsgBox("After Deserialization . " & vbCrLf & vbCrLf &
"Memory Stream Capacity: " & myMemoryStream. Capacity & vbCrLf & "Memory Stream
Length: " & myMemoryStream. Length & vbCrLf & "Memory Stream Position: "
& myMemoryStream. Position)
myMemoryStream. Close()
myMemoryStream = Nothing
Catch
MsgBox("Error occurred in sub CloneMe." & vbCrLf & vbCrLf &
Err.Description , MsgBoxStyle.Cri tical)
CloneMe = Nothing
End Try
End Function
End Class
BTW
Are your VB.NET dll named as TartanCls?
If so, you may need to place it in the same directory as the VB6 Exe
file or you can use the command line below to register the VB.NET
classlibrary. regasm /codebase ClassLibrary3.d ll
Regards,
Peter Huang
Microsoft Online Partner Support
Get Secure! www.microsoft.com/security
This posting is provided "as is" with no warranties and confers no rights.
--------------------
>From: "Ben Hannon" <ha****@brodart .com>
>References: <eQ************ *@TK2MSFTNGP10. phx.gbl>
<eS************ **@tk2msftngp13 .phx.gbl>
>Subject: Re: VB.NET COLLECTION VB6 COM
>Date: Thu, 16 Oct 2003 11:59:55 -0400
>Lines: 243
>MIME-Version: 1.0
>Content-Type: multipart/alternative;
> boundary="----=_NextPart_000_ 0092_01C393DD.0 3CE8EF0"
>X-Priority: 3
>X-MSMail-Priority: Normal
>X-Newsreader: Microsoft Outlook Express 6.00.2800.1158
>X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165
>Message-ID: <##************ **@TK2MSFTNGP10 .phx.gbl>
>Newsgroups: microsoft.publi c.dotnet.langua ges.vb
>NNTP-Posting-Host: 12.29.184.66
>Path: cpmsftngxa06.ph x.gbl!TK2MSFTNG P08.phx.gbl!TK2 MSFTNGP10.phx.g bl
>Xref: cpmsftngxa06.ph x.gbl microsoft.publi c.dotnet.langua ges.vb:147338
>X-Tomcat-NG: microsoft.publi c.dotnet.langua ges.vb
>
>I did a little more looking into this bug and discovered it is
occurring when I try
>to deserialize my Memory Stream:
>Public Function CloneMe(ByVal Data As Object) As Object
>Dim myMemoryStream As New System.IO.Memor yStream
>Dim MyFormatter As New BinaryFormatter
>Try
>MsgBox("Befo re Serialization. " & vbCrLf & vbCrLf & "Memory Stream
Capacity: " & myMemoryStream. Capacity)
>MyFormatter.Se rialize(myMemor yStream, Data)
>MsgBox("Afte r Serialization. " & vbCrLf & vbCrLf & "Memory Stream
Capacity: " & myMemoryStream. Capacity & vbCrLf & "Memory Stream Length:
"& myMemoryStream. Length & vbCrLf & "Memory Stream Position: " &
myMemoryStream. Position)
>myMemoryStream .Seek(0, SeekOrigin.Begi n)
>MsgBox("Afte r Reset. " & vbCrLf & vbCrLf & "Memory Stream Capacity: "
& myMemoryStream. Capacity & vbCrLf & "Memory Stream Length: " &
myMemoryStream. Length & vbCrLf & "Memory Stream Position: " &
myMemoryStream. Position)
>***CloneMe = MyFormatter.Des erialize(myMemo ryStream)
>MsgBox("Afte r Deserialization . " & vbCrLf & vbCrLf & "Memory Stream
Capacity: " & myMemoryStream. Capacity & vbCrLf & "Memory Stream Length:
"& myMemoryStream. Length & vbCrLf & "Memory Stream Position: " &
myMemoryStream. Position)
>myMemoryStream .Close()
>myMemoryStre am = Nothing
>Catch
>MsgBox("Erro r occurred in sub CloneMe." & vbCrLf & vbCrLf &
Err.Description , MsgBoxStyle.Cri tical)
>CloneMe = Nothing
>End Try
>End Function
>The red/asterisked line above is the line that generates this error.
>Ben Hannon
>"Ben Hannon" <ha****@brodart .com> wrote in message
news:eS******** ******@tk2msftn gp13.phx.gbl...
>> Actually, those links helped me decide to kill trying to pass the
VBA >> Collection since I can't serialize it. What I decided to do instead
is to
>> create a VB.NET collection with the ArrayList class and expose the
methods
>> needed for COM Interop. Everything works perfectly when running the
Class
>> as a Console App (clone works perfectly). However, when I compile it asa >> DLL and try to use it in my VB6 app, when I try to clone an object I
get the
>> error "Cannot find the assembly TartanCls, Version=1.0.138 4.16492,
>> Culture=neutral , PublicKeyToken= null." Any ideas?
>>
>> Ben Hannon
>>
>> "Ben Hannon" <ha****@brodart .com> wrote in message
>> news:eQ******** *****@TK2MSFTNG P10.phx.gbl...
>> > Hi,
>> >
>> > I'm writting a COM Class in VB.NET to be used in a VB6 project
(Tired of
>> > the VB6 hassles with cloning and serializing an object). All my
>> > classes I need cloneable/serializable are now in a VB.NET class
that >> exposes
>> > those objects to COM perfectly. However I ran into a problem
because some
>> > of these objects requires a Collection. When I compile this
project with
>> > the VB.NET Collection exposed for a property, I get a compile time
error
>> > that VB cann't find Type Library "Microsoft.Visu alBasic". I even
tried
>> > using VBA.CollectionC lass, but everytime I try to create a new object in
>> > VB6, the object stays equal to nothing (Doesn't create).
>> >
>> > Ben Hannon
>> > Williamsport, PA
>> >
>> >
>>
>>
>
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last post by:
In VB 6, the loop iterator v in the following code must be a variant.
dim v as variant
dim c as new collection
for each v in collection
...
next v
What is the general translation in VB 7.1 and VB 8 Beta 1? Also, is there
an easy way to force "v" to be an early bound variable. In VB 6 this can be
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by: Matt Michael |
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I have a listview control and a collection object right now that I'm trying
to pass information to and from. Whenever I click on the checkbox, I want
it to remove certain listview items and add them to the collection.
Whenever I uncheck the checkbox, I want to add the items back into the
listview from the collection, and remove them from the collection so I can
do the process multiple times. The listview tag is being used as a key, so
I...
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by: Chet Cromer |
last post by:
I am creating a set of base classes and sub classes to use throughout a
program I'm developing. The base class represents a generic "lookup
table" from my database that contains lists of things like
manufacturers, makes, modes, etc. of cars. I have created a generic
"datacollection" class and a generic "dataobject" class to represent the
table and the rows within that table as a collection of objects with
generic properties for...
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by: Scott M. Lyon |
last post by:
As I mentioned in my other post, I'm attempting to, using COM Interop so I
can update existing VB6 code to (for several specific functions) return a
Hashtable from a .NET library.
I've had very little luck processing the Hashtable itself in VB6 (I can add
a reference to the project so it knows what a Hashtable is, but I'm not
having much luck looping through all objects in the Hashtable), so I decided
to try a different idea.
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by: Arthur Dent |
last post by:
How do you sort a generic collection derived from
System.Collections.ObjectModel.Collection?
Thanks in advance,
- Arthur Dent
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by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
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by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
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by: jinu1996 |
last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth.
The Art of Business Website Design
Your website is...
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by: agi2029 |
last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own....
Now, this would greatly impact the work of software developers. The idea...
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by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules.
He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms.
Adolph will...
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by: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
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by: TSSRALBI |
last post by:
Hello
I'm a network technician in training and I need your help.
I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs.
The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols.
I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
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by: 6302768590 |
last post by:
Hai team
i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
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by: bsmnconsultancy |
last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...
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