Access Vb6 Com Interface in C# . please help thank

MIB · April 26th, 2004, 07:56 PM

HI
I got VB6 com interface "LANNTBSMTSCOMP" and VB6 COM object "CLANC".
The probject reference "LANNTBSMTSCOMP" only.

In VB.NET project I call call "CLANC" without any problem as below:

Code:

Dim lvobjClientLogon As LANNTBSMTSCOMP.IlancClientLogon
Dim lvstrChallenge As String
        lvobjClientLogon = CreateObject("CLANC.CClientLogon")
        lvstrChallenge = lvobjClientLogon.GetLogonChallenge("1", "2", "3", "4", "5", "6")

But I cant do it in C#... Can anyone help me? I try code as below:

Code:

Type objClientLogonType = Type.GetTypeFromProgID("CLANC.CClientLogon");
LANNTBSMTSCOMP.IlancClientLogon    lvobjClientLogon;
lvobjClientLogon =(LANNTBSMTSCOMP.IlancClientLogon)Activator.CreateInstance(objClientLogonType);
object[] objArgues = {"1", "2", "3", "4", "5", "6"};
object c = objClientLogonType.InvokeMember("GetLogonChallenge", BindingFlags.InvokeMethod, null, lvobjClientLogon, objArgues);
Console.Writelin(c.ToString());

in C# i got error :

Unhandled Exception: System.Runtime.InteropServices.COMException (0x80020006): U
nknown name.

Can anyone help me for this??

thanks

nagendrakumar_b · April 27th, 2004, 02:31 AM

HI,

i understood ur problem, although i'm not well explored to c# but i'm well aware of vb.net.The solution might be related to the difference of using interfaces in vb6 with the other language(including vb.net). DOn't try use the interface object by castingthe orginial object to it. Just do it in reverse way.

debsoft · April 28th, 2004, 08:28 AM

Hi MIB,

Try to create a Runtime Callable Wrapper using tlbimp.exe utility in .NET...Then try your code in C#... Actually when accessing COM components from .NET app, one needs to create a RCW...you can get to know abt how to use the utility in MSDN documentation...

HTH.

cheers
Debsoft

Quote:

quote:Originally posted by MIB
HI
I got VB6 com interface "LANNTBSMTSCOMP" and VB6 COM object "CLANC".
The probject reference "LANNTBSMTSCOMP" only.

In VB.NET project I call call "CLANC" without any problem as below:

Code:

Dim lvobjClientLogon As LANNTBSMTSCOMP.IlancClientLogon
Dim lvstrChallenge As String
        lvobjClientLogon = CreateObject("CLANC.CClientLogon")
        lvstrChallenge = lvobjClientLogon.GetLogonChallenge("1", "2", "3", "4", "5", "6")

But I cant do it in C#... Can anyone help me? I try code as below:

Code:

Type objClientLogonType = Type.GetTypeFromProgID("CLANC.CClientLogon");
LANNTBSMTSCOMP.IlancClientLogon    lvobjClientLogon;
lvobjClientLogon =(LANNTBSMTSCOMP.IlancClientLogon)Activator.CreateInstance(objClientLogonType);
object[] objArgues = {"1", "2", "3", "4", "5", "6"};
object c = objClientLogonType.InvokeMember("GetLogonChallenge", BindingFlags.InvokeMethod, null, lvobjClientLogon, objArgues);
Console.Writelin(c.ToString());

in C# i got error :

Unhandled Exception: System.Runtime.InteropServices.COMException (0x80020006): U
nknown name.

Can anyone help me for this??

thanks

cheers,
debsoft