C++ convert UnicodeString into String

Question

Please help me somebody to convert unicodestring into string

This is how i am getting unicodestring

UnicodeString _str = OpenDialog1->FileName;

Or if it possible to write into file unicode string with ifstream or something like that?

Thanks

UnicodeString::t_str Method, yes you can also write into file too, just prefix your file with BOM. — Roman Ryltsov
– Roman Ryltsov, Commented Jul 2, 2012 at 10:11
Stay away from the t_str() method. It is dangerous to use, as it modifies the internal data of the UnicodeString, and has been removed in later versions of C++Builder anyway. — Remy Lebeau
– Remy Lebeau, Commented Jul 2, 2012 at 22:37

Remy Lebeau · Accepted Answer · 2012-07-02 22:43:18Z

9

Depending on your needs, assign the UnicodeString to an AnsiString or a UTF8String, and then write that to your file instead of the original UnicodeString itself:

UnicodeString _str = OpenDialog1->FileName; 
AnsiString _astr = _str;

Or:

UnicodeString _str = OpenDialog1->FileName; 
UTF8String _ustr = _str;

To pass an AnsiString/UTF8String to an STL function, you have to either:

1) use the c_str() method:

stream << _astr.c_str();

2) construct a temp std::string:

stream << std::string(_astr.c_str(), _astr.Length());

3) in the case of AnsiString only, specify the VCL_IOSTREAM define in your project to enable AnsiString's own <<< and >> operators:

stream << _astr;

answered Jul 2, 2012 at 22:43

Remy Lebeau

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MvG · Accepted Answer · 2012-07-02 10:05:19Z

2

Converting your string to bytes would require some encoding. There are various libraries that do this, so it depends on the framework you are using.

As an alternative, you could use wofstream to write wchar_t characters to the stream.

answered Jul 2, 2012 at 10:05

MvG

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CWTstackoverflow · Accepted Answer · 2015-02-10 09:56:00Z

0

std::string converted;
us.toUTF8String(converted);

us is (ICU) UnicodeString

answered Feb 10, 2015 at 9:56

CWTstackoverflow

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