interop

I have a large application written in native C++. I also have a class in C# that I need to call. If the C# class was static, then it would be trivial (there's lots of examples on the web) - just write the mixed C++/CLI wrapper, export the interfaces, and you're done. However, the C# class is non-static, and can't be changed to static as it has an interface (the compiler will generate an error if you attempt to make the C# class static). Has anyone run into this problem before - how do I export a non-static C# class to native C++? Update 2010-11-09 Final solution: tried COM, this worked nicely

I've got a library in C which I'd like to use from C#. From what I've gleaned off the internet, one idea is to wrap it in a C++ dll, and DllImport that. The problem is that the function I want to call has a fairly nasty parameter set: including a reference to a function (which will be a .NET function), and a couple of arrays (some write, some read). int lmdif(int (*fcn)(int, int, double*, double*, int*), int m, int n, double* x, double ftol, double xtol, double gtol, int maxfev, double epsfcn, double factor) Given an interface like this, what are the nasties I should be looking out for? (And

I'd like to dynamically load and use a .Net assembly created in C# from a Delphi Win32 application. My classes and interfaces are marked as ComVisible, but I would like to avoid registering the assembly. Is this possible? P.S. I found here link text another good discussion on the topic, but it is more around hosting the CLR. Which begs a question - why would you host CLR versus using ClrCreateManagedInstance? Sergey Aldoukhov Strangely enough, I couldn't find an answer on StackOverflow, and there is not much on the Net, especially for Delphi. I found the solution from examples posted here .

I know the basics of clojure/java interop: calling java from clojure and vice versa. However, I was not able to return a typed collection from clojure to java. I am trying to see something of that nature List<TypedObject> from the java code which is calling into clojure. Java Object: public class TypedObject { private OtherType1 _prop1; public OtherType1 getProp1() { return _prop1; } public void setProp1(OtherType1 prop1) { _prop1 = prop1; } } CLojure method: (defn -createListOfTypedObjects "Creates and returns a list of TypedObjects" [input] ;Do work here to create and return list of

I am writting a Python script and I am running out of time. I need to do some things that I know pretty well in bash, so I just wonder how can I embed some bash lines into a Python script. Thanks ghostdog74 If you want to call system commands, use the subprocess module. The ideal way to do it: def run_script(script, stdin=None): """Returns (stdout, stderr), raises error on non-zero return code""" import subprocess # Note: by using a list here (['bash', ...]) you avoid quoting issues, as the # arguments are passed in exactly this order (spaces, quotes, and newlines won't # cause problems): proc

Probably a noob question but interop isn't one of my strong points yet. Aside from limiting the number of overloads is there any reason I should declare my DllImports like: [DllImport("user32.dll")] public static extern int SendMessage(IntPtr hWnd, int msg, int wParam, IntPtr lParam); And use them like this: IntPtr lParam = Marshal.AllocCoTaskMem(Marshal.SizeOf(formatrange)); Marshal.StructureToPtr(formatrange, lParam, false); int returnValue = User32.SendMessage(_RichTextBox.Handle, ApiConstants.EM_FORMATRANGE, wParam, lParam); Marshal.FreeCoTaskMem(lParam); Rather than creating a targeted

I'm writing an app where I need to retrieve some rows from a DB and dump them into an Excel spreadsheet. I'm using Linq to retrieve these rows. Is it possible to dump these rows directly into their counterparts in the Excel sheet (where one cell in Excel corresponds to one cell from the DB)? There's no direct way to connect these two. It sounds like you want LINQ to SQL to handle the query generation, but not the O/R mapping (because Excel wouldn't know what to do with the objects that come out of LINQ- they don't look like data rows any more). You can do that first part by calling

Is there some method of using C source mixed with inline asm (this is not C++ code) in a C# app? I'm not picky about how it gets done, if it requires compiling the C/asm into a DLL alongside the C# app, so be it. I'm aware there's no provision for using assembly inside C#, hence this question. Sample code of what I'm trying to incorporate: SomeFunc(unsigned char *outputData, unsigned char *inputData, unsigned long inputDataLength) { _asm { //Assembly code that processes inputData and stores result in outputData } } There are some pointer/variable declarations in the C code before that function