Marshal C++ int array to C#

by 
[DllImport("wrapper_demo_d.dll")]
public static extern IntPtr fnwrapper_intarr();

IntPtr ptr = fnwrapper_intarr();
int[] result = new int[3];
Marshal.Copy(ptr, result, 0, 3);

You need also to write Release function in unmanaged Dll, which deletes pointer created by fnwrapper_intarr. This function must accept IntPtr as parameter.

DLL_EXPORT void fnwrapper_release(int* pArray)
{
    delete[] pArray;
}

[DllImport("wrapper_demo_d.dll")]
public static extern void fnwrapper_release(IntPtr ptr);

IntPtr ptr = fnwrapper_intarr();
...
fnwrapper_release(ptr);

More Related Contents:

  1. Add to a List from two Classes in C# [closed]
  2. c# htmlagilitypack cant take /a
  3. Use Unity API from another Thread or call a function in the main Thread
  4. Multidimensional Array [][] vs [,] [duplicate]
  5. Is there a way of setting culture for a whole application? All current threads and new threads?
  6. Suspending event not raising using WinRT
  7. Entity Framework async operation takes ten times as long to complete
  8. How to update record using Entity Framework 6?
  9. What is the use of ObservableCollection in .net?
  10. Could not find a part of the path … bin\roslyn\csc.exe
  11. How to get current user, and how to use User class in MVC5?
  12. mail sending with network credential as true in windows form not working
  13. Apostrophe (‘) in XPath query
  14. Serialization of Entity Framework objects with One to Many Relationship
  15. How do Prefix (++x) and Postfix (x++) operations work?
  16. asp.net: Invalid postback or callback argument
  17. How do I override List’s Add method in C#?
  18. Find the most occurring number in a List
  19. Why aren’t variables declared in “try” in scope in “catch” or “finally”?
  20. How to retrieve the LoaderException property?
  21. Is there any way to start a GUI application from a windows service on Windows 7?
  22. ViewModel validation for a List
  23. Send JSON via POST in C# and Receive the JSON returned?
  24. C# – Inconsistent math operation result on 32-bit and 64-bit
  25. Entity Framework Queryable async
  26. Best way to check if a Data Table has a null value in it
  27. How can I Unescape and Reescape strings in .net?
  28. Entity Framework 4.1: Unable to cast from DbQuery to ObjectQuery
  29. How to empty/flush Windows READ disk cache in C#?
  30. Prevent users from resizing the window/form size

Leave a Comment