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SQL: Create Assembly::

Posted on 2013-11-18
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Last Modified: 2013-11-19
Hello team,
There is a DLL that I am trying to create assembly for and  call from SQL server 2008 r2 and I am getting the following message:
Msg 6544, Level 16, State 1, Line 1
CREATE ASSEMBLY for assembly 'DLLTest' failed because assembly 'DLLTest' is malformed or not a pure .NET assembly. 
Unverifiable PE Header/native stub.

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and the assembly creating statement is :

CREATE ASSEMBLY DLLTest
AUTHORIZATION dbo
FROM 'C:\Users\jesraelo\Downloads\BergDataLink.DLL'
WITH PERMISSION_SET = unsafe

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The following conditions are met:
> .Net 4.0
> Microsoft SQL Server 2008 R2 (RTM) - 10.50.1617.0 (X64)   Apr 22 2011 19:23:43   Copyright (c) Microsoft Corporation  Developer Edition (64-bit) on Windows NT 6.1 <X64> (Build 7601: Service Pack 1)
> This DLL is currently is in use in multiple VB scripts of another application.

So, to create an assembly and call the DLL at this is an issue for me IN SQL that I am trying to figure out and any assistance and help will be appreciated.
thx
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Question by:John Esraelo
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Expert Comment

by:käµfm³d 👽
ID: 39657053
Was BergDataLink.DLL written in .NET?
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Author Comment

by:John Esraelo
ID: 39657170
I believe so, I have forwarded this question to the developer just to make sure I am accurate on this.
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Author Comment

by:John Esraelo
ID: 39657590
Alright, have found out that it was being done in visual foxPro  VFP ..

I guess, it is safe to say .. " my goose is cooked.. "..   now what?
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by:käµfm³d 👽
ID: 39657604
I have never worked in FoxPro. You *might* be able to write a .NET wrapper around the VFP, but I am not certain.
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Author Comment

by:John Esraelo
ID: 39657650
It may be the only way. I have not done that either.

So, how would that work.  I will make a wrapper, in C# for instance, that would call the VFP.DLL and then create an assembly in SQL for the wrapper?
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Expert Comment

by:käµfm³d 👽
ID: 39657668
Yes.
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Author Comment

by:John Esraelo
ID: 39657680
that about sums it up..

now, I am going to learn how to make a DLL in c# that would accept the ARGs, creates object for the vfp dll, pass the args to VFP dll and get the results back and pass back to sql..

like we say...
marrona mia
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Accepted Solution

by:
käµfm³d   👽 earned 500 total points
ID: 39657691
Before you get too deep into it, I would suggest creating a small throw-away project that you can test with. In this way you won't spend too much time on it if it doesn't work. That is, unless your VFP project isn't that large to begin with.
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Author Comment

by:John Esraelo
ID: 39657828
The VFP DLL has been created around 3 years ago and one of our applications has been using it to update the records in VFP from a VB calling process / module.  Therefore, I don't have to worry about anything on that VFP side.. the DLL is smart  enough to know which table we are updating/inserting, etc. ..
So, to make the short story longer, I can play with a table that is not used today in that vfp side and examine that by writing a small note or comments or something..
just to see if it works.

The problem is that I have been away from C# for over 5 years now.. so bit rusty..
currently looking into some info : see below
http://foxcentral.net/microsoft/netforvfpdevelopers_chapter15.htm
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Author Closing Comment

by:John Esraelo
ID: 39659731
Thank you for the pointer and advice
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