CODEWITHSUNDEEP
stringc++-cliunsigned-char
User987123
User987123

Reputation: 97

Convert System::String^ into unsigned char*

I have a C++-Dll which I am calling from a C# project. In a function I need a string as a parameter and then convert it to an unsigned char*. I am using System.String^ to convert the C#-String to a C++-String. How can I convert the String^ to an unsigned char * in C++?

I tried this but it isn't working:

void Function(String^ userInput)
{
    unsigned char* msg;
    strcpy((char*)msg, userInput); // Doesn't work    
}

Upvotes: 0

Views: 686

Answers (1)

wdudzik
wdudzik

Reputation: 1344

you can do it with this code:

using namespace System::Runtime::InteropServices;
const unsigned char* str = (const unsigned char*) (Marshal::StringToHGlobalAnsi(managedString)).ToPointer();

Also remeber to free the newly allocated resource with Marshal::FreeHGlobal(), when the string is no longer in use, otherwise you will have memory leak.

Upvotes: 2

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