RE: Turn off level in View, C++

Very good solution.  Here is Jon's suggestion in the source code:

std::wstring convertStringto_wchar_t(string s)
{
	const size_t cSize = s.length() + 1;
	wchar_t* wc = new wchar_t[cSize];
	mbstowcs(wc, s.c_str(), cSize);
	std::wstring converted(wc);
	delete[] wc;
	return converted;
}
extern "C"  DLLEXPORT int   MdlMain
(){
	int worked;
	string line;
	ifstream infile;
	appendToFile("");
	infile.open("Turn off Levels.txt");
	if (infile.is_open()){
		while (getline(infile, line)) // Saves the line in id
		{
			const std::wstring& levelName = convertStringto_wchar_t(line);
			DgnModelRefP modelRef = mdlModelRef_getActive();
			LevelID levid;
			mdlLevel_getIdFromName(&levid, modelRef, LEVEL_NULL_ID, levelName.c_str());
			worked = mdlView_setLevelDisplay(modelRef, 0, levid, FALSE);//not working, worked = 0
		}
	}
	infile.close();
	mdlDialog_cmdNumberQueue(FALSE, CMD_MDL_UNLOAD, mdlSystem_getCurrTaskID(), TRUE);
	return SUCCESS;
}

Though I like your solution better, why couldn't I dereference my pointer later in the code?

extern "C"  DLLEXPORT int   MdlMain
(){
	int worked;
	string line;
	ifstream infile;
	appendToFile("");
	infile.open("Turn off Levels.txt");
	if (infile.is_open()){
		while (getline(infile, line)) // Saves the line in id
		{
			MSWCharP levelName;
			levelName = convertStringto_wchar_t(line);
			DgnModelRefP modelRef = mdlModelRef_getActive();
			LevelID levid;
			mdlLevel_getIdFromName(&levid,modelRef,LEVEL_NULL_ID,levelName);
			delete levelName;
			worked = mdlView_setLevelDisplay(modelRef, 0, levid, FALSE);//not working, worked = 0
		}
	}
	infile.close();
	mdlDialog_cmdNumberQueue(FALSE, CMD_MDL_UNLOAD, mdlSystem_getCurrTaskID(), TRUE);
	return SUCCESS;
}

Thank you for the help!

I was not aware that MicroStation treats a char * like a wchar_t*.  I also have not used wstrings very much, so I appreciated the example.