CODEWITHSUNDEEP
stringc++-cliwidechar
user2990515
user2990515

Reputation: 93

String conversion from System::String ^ to const wchar_t *

I'm trying to open a file using a string parameter, however I'm getting the following error:

error C2664: 'void std::basic_ifstream<_Elem,_Traits>::open(const wchar_t *,std::ios_base::openmode,int)' : cannot convert parameter 1 from 'System::String ^' to 'const wchar_t *'

How do you convert System::String ^ to const wchar_t *?

Upvotes: 2

Views: 4757

Answers (1)

Jeff
Jeff

Reputation: 2505

As Hans points out, simple conversion is necessary. It would look similar to the following:

System::String ^str = L"Blah Blah";
pin_ptr<const wchar_t> convertedValue = PtrToStringChars(str);  // <-- #include <vcclr.h>
const wchar_t *constValue = convertedValue;                     // <-- Unnecessary, but to be completely verbose
void std::basic_ifstream<_Elem, _Traits>::open(constValue, mode, i);

Upvotes: 6

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