how to add a class library to my project? Help

Question

Hi all,

 

 

I have been trying to learn on my own how to add a class library to a project but without avail.

 

Basically, I am following the guide from MSDN

 

https://msdn.microsoft.com/en-us/library/cc668164(d=printer).aspx 

 

From the tutorial, I am supposed to be able to click on the add reference and select the class library and add in.  But, when I click on the class library it opens up further and I am stuck on which one to add.  I tried the properties files but it gives me error.

 

Can someone show me an example how to do it ?

 

Also, I wonder if it is possible to create a project and create a class library from there for the Object layer without creating 2 projects like what the MSDN did ?

 

Tks.

Answer 1

Hi Josh, I think you would find the following article by Paul DiLascia useful: http://msdn.microsoft.com/msdnmag/issues/03/02/CQA/default.aspx Hope this help, MCB.

Answer 2

OK, I'll try to explain. I have an unmanaged C++ library that works with a piece of hardware. I wrote a managed C++ wrapper for the library. My main app is in C#. The hardware (library) raises an event in the unmanaged C++ . I want to call a routine in the GUI (C#). To do that I send a delegate from the C# program to the c++ program. The managed C++ wrapper gives me the ability to declare a reference in the C# program. I do not want to declare routines in external dll's. The delegate is called. That part works. The problem is that I can't get the C++ to pass the whole array over to the C#. Only the first element in the array seems to arrive. I once had this defined as unsafe code, and passed a *byte instead of []byte - and it worked. I was just trying to make this code safe. Hope this explains my intentions. Thanks for all your patience. Josh

Answer 3

For the record are talking C# or C++ here ^_^

Answer 4

Thanks, but I already got it to work with unsafe code. This is how it looked: typedef void __stdcall FoundPidFunction ( unsigned char *pData, } However, I want it to work with safe code. Am I asking too much from MS? Josh

Answer 5

maybe it's easier to use unsafe code. Let the unmanaged function return a pointer to the first byte in the array. Let that function take a parameter in wich to store the length of the array. Then you could use unsafe C# code to get the byte array. int length; byte* ptr = UnmanagedFunction(&length); byte[] bytes = new bytes[length]; for(int i = 0; i < length; i++) { bytes[i] = *(ptr+i); }