CODEWITHSUNDEEP
c#c++c++-cxwindows-rt
ashtrail
ashtrail

Reputation: 93

C++/CX : Convert std::string to Platform::String^

Is there a simple way (one line of code would be cool) to convert à std::string to a Platform::String^ in C++/CX ?

I found how to do it the other way(String^ to string) but nothing for this one.

Something like :

std::string str = "Hello World";
Platform::String^ p_str = convertFromString(str);

(In the example it's pointless but when you were working with std::string in c++ and you want to send it to some C# code it makes more sense)

Upvotes: 4

Views: 7139

Answers (4)

Nil0
Nil0

Reputation: 11

If you in the conversion does not like to be limited to Basic Latin (Unicode block), like in my case the need for æøå, this works: 

#include <sstream>

Platform::String^ StdStringToPlatformString(std::string str)
{
   std::wstringstream wss;
   wss << str.c_str();
   return ref new Platform::String(wss.str().c_str());
}

Upvotes: 1

Heefan
Heefan

Reputation: 395

The method works for me

Platform::String ^ convertFromString(const std::string & input)
{
    std::wstring w_str = std::wstring(input.begin(), input.end());
    const wchar_t* w_chars = w_str.c_str();

    return (ref new Platform::String(w_chars));
}

Upvotes: 3

apnorton
apnorton

Reputation: 2440

There is no direct std::string to std::wstring conversion currently possible.

However, we can do a roundabout conversion from std::string to std::wstring, then from std::wstring to Platform::String as follows:

#include <locale>
#include <codecvt>
#include <string>

Platform::String^ stringToPlatformString(std::string inputString) {
  std::wstring_convert<std::codecvt_utf8<wchar_t>> converter;
  std::wstring intermediateForm = converter.from_bytes(inputString);
  Platform::String^ retVal = ref new Platform::String(intermediateForm.c_str());

  return retVal;
}

See this question for more information on std::string to std::wstring conversion.

Upvotes: 2

ashtrail
ashtrail

Reputation: 93

So basically the answer is no : it's more complicated. You need to first convert the std::string in std::wstring and then use user1's answer (convert std::wstring to Platform::String^). For the string to wstring conversion you can check this other question (which doesn't work for me but whatever, I'll just have to go for a more in depth conversion).

(I had put some code but was told it was terrible to do it like this, since I just do it for debugging and wil delete it anyway I don't care but I don't want to give anti-advice so I deleted that code)

Upvotes: 0

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