Accessing a non-DotNet assembly from an ASP.Net application

[trent dudei]

Hello,
Here is my scenario: I have a Distances class that contains a
GetDistanceFromCities method. This method makes a call to an external 3rd
party non-.net asembly (miles32.dll). Everything works propery when I
instantiate the class from a command line app and call the method, but when I
call the same thing from my ASP.Net Web Service the call fails. It doesn't
throw an exception, it just fails to return a valid result (as if it can't
access the other associated assemblies that came with miles32.dll).

My first hunch was that it was security related, so I tried impersonation
in the code, but that had no effect.

So do I have to add machine.config entries to trust this assemble? Do I
have to add the path to the aseembly in the environmental variables somewhere?

I'm at a loss, any suggestions would be greatly appreciated.

thanks,
-James Divine
di*****@wausauhomes.com

[Sharon]

Try adding ASPCOMPAT="TRUE" to the page directive.
Also this page may help:
http://support.microsoft.com/default...b;en-us;308095
Sharon.
"trent dudei" <tr********@discussions.microsoft.com> wrote in message
news:C9**********************************@microsof t.com...

Hello,
Here is my scenario: I have a Distances class that contains a
GetDistanceFromCities method. This method makes a call to an external 3rd
party non-.net asembly (miles32.dll). Everything works propery when I
instantiate the class from a command line app and call the method, but
when I
call the same thing from my ASP.Net Web Service the call fails. It
doesn't
throw an exception, it just fails to return a valid result (as if it can't
access the other associated assemblies that came with miles32.dll).

My first hunch was that it was security related, so I tried impersonation
in the code, but that had no effect.

So do I have to add machine.config entries to trust this assemble? Do I
have to add the path to the aseembly in the environmental variables
somewhere?

I'm at a loss, any suggestions would be greatly appreciated.

thanks,
-James Divine
di*****@wausauhomes.com

[trent dudei]

Hi Sharon,

This call is being made from a Web Service, so I have no UI (and thus no
page directives). Is there another way I can toggle the ASPCOMPAT property?

-James

"Sharon" wrote:

Try adding ASPCOMPAT="TRUE" to the page directive.
Also this page may help:
http://support.microsoft.com/default...b;en-us;308095
Sharon.
"trent dudei" <tr********@discussions.microsoft.com> wrote in message
news:C9**********************************@microsof t.com...

Hello,
Here is my scenario: I have a Distances class that contains a
GetDistanceFromCities method. This method makes a call to an external 3rd
party non-.net asembly (miles32.dll). Everything works propery when I
instantiate the class from a command line app and call the method, but
when I
call the same thing from my ASP.Net Web Service the call fails. It
doesn't
throw an exception, it just fails to return a valid result (as if it can't
access the other associated assemblies that came with miles32.dll).

My first hunch was that it was security related, so I tried impersonation
in the code, but that had no effect.

So do I have to add machine.config entries to trust this assemble? Do I
have to add the path to the aseembly in the environmental variables
somewhere?

I'm at a loss, any suggestions would be greatly appreciated.

thanks,
-James Divine
di*****@wausauhomes.com

[Sharon]

Add [STAThread] attribute on the class
or the method that is making the call to the com object.
Sharon.
"trent dudei" <tr********@discussions.microsoft.com> wrote in message
news:86**********************************@microsof t.com...

Hi Sharon,

This call is being made from a Web Service, so I have no UI (and thus
no
page directives). Is there another way I can toggle the ASPCOMPAT
property?

-James

"Sharon" wrote:

Try adding ASPCOMPAT="TRUE" to the page directive.
Also this page may help:
http://support.microsoft.com/default...b;en-us;308095
Sharon.
"trent dudei" <tr********@discussions.microsoft.com> wrote in message
news:C9**********************************@microsof t.com...

>
>
> Hello,
> Here is my scenario: I have a Distances class that contains a
> GetDistanceFromCities method. This method makes a call to an external
> 3rd
> party non-.net asembly (miles32.dll). Everything works propery when I
> instantiate the class from a command line app and call the method, but
> when I
> call the same thing from my ASP.Net Web Service the call fails. It
> doesn't
> throw an exception, it just fails to return a valid result (as if it
> can't
> access the other associated assemblies that came with miles32.dll).
>
> My first hunch was that it was security related, so I tried
> impersonation
> in the code, but that had no effect.
>
> So do I have to add machine.config entries to trust this assemble? Do
> I
> have to add the path to the aseembly in the environmental variables
> somewhere?
>
> I'm at a loss, any suggestions would be greatly appreciated.
>
> thanks,
> -James Divine
> di*****@wausauhomes.com