Mixed mode managed c

Posted By: FluffyDevilBunny | Apr 30th, 2007 @ 9:21 AM
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#Apr 30th, 2007 @ 9:21 AM
FluffyDevilBunny
FluffyDevilBunny
GO GO GADGET COMPILER!
Hi all,

We have a mixed mode managed c dll here and I need help.

The internals of the dll are using native c and the interface is exposing managed c so that c# can call it. We are passing a System.String into the dll and need to convert it to char*.

Currently the developer is looping for each character in the string and placing the value into the char. There has got to be a better way.

Anyone?

Thanks

FDB
#May 1st, 2007 @ 8:45 AM
FluffyDevilBunny
FluffyDevilBunny
GO GO GADGET COMPILER!

I have my answer. I will post it so that it is in the archives incase anyone else needs it.

System::String^ CString2DotNetOut()
{

          char* cString = "20 chars for testing";
          System::String^ sString = System::Runtime::InteropServices::Marshal::PtrToStringAnsi(System::IntPtr(cString));
          return sString;
}

void DotNetString2CStringOut(System::String^ sString)
{

          char* cString = (char*)System::Runtime::InteropServices::Marshal::StringToHGlobalAnsi(sString).ToPointer();
          cout << cString;
}

FDB

#May 2nd, 2007 @ 3:24 PM
amotif
amotif
No Silver Bullet
Don't forget to free the allocation made by StringToHGlobalAnsi... Smiley
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