How to convert DWORD to wstring?

Question

I want to convert a DWORD value to wstring value.

DWORD dw;
wstring wstr(L"");
dw = 2;

Can you suggest ideal way to assign 'dw' to 'dwstr' ?

score 13 · Accepted Answer · answered Jun 12 '13 at 06:05

13

std::wstring wstr = std::to_wstring(dw);

answered Jun 12 '13 at 06:05

chris

Hi Chris, If I use wstr = std::to_wstring(dw), I am getting error as "more than one overload function matches for the arguments". Please suggest to rectify the error. – Rajasekhar Jun 12 '13 at 06:15
1

@Rajasekhar, Try explicitly casting it to an `unsigned long long` IIRC. It used to only have a couple of overloads instead of all of them. – chris Jun 12 '13 at 06:16
Will it cause any problem, if we cast from "unsigned long" to "unsigned long long" ? – Rajasekhar Jun 12 '13 at 06:24
3

@Rajasekhar Promotion from unsigned long to unsigned long long does not result in any loss of information. What sort of problems are you thinking of? (It sounds like you're having more fundamental issues with the C++ language. You might want to familiarize yourself with the type system.) – Raymond Chen Jun 12 '13 at 06:25
Thanks Raymond. I am new to C++ and I am developing applications. – Rajasekhar Jun 12 '13 at 06:27

score 2 · Answer 2 · answered Jun 12 '13 at 06:07

2

If you're using an older compiler that doesn't have std::to_wstring, consider lexical_cast (e.g., from Boost) instead.

As an aside, if you want to create wstr as an empty string, just wstring wstr; suffices.

answered Jun 12 '13 at 06:07

Jerry Coffin

@JerryCoffin has `lexical_cast` been included into the standard? – Koushik Shetty Jun 12 '13 at 06:22
@Koushik, No, it hasn't, but Boost is almost a must for C++ developers. – chris Jun 12 '13 at 06:27
@Koushik: no, but if you don't want to use Boost's, you can [write your own](http://stackoverflow.com/a/15771007/179910) pretty easily. – Jerry Coffin Jun 12 '13 at 06:28
@chris yes i agree with that. But would have been good to see it in the standard though. – Koushik Shetty Jun 12 '13 at 06:29
@JerryCoffin nice!. Thanks for the link. – Koushik Shetty Jun 12 '13 at 06:29

score 0 · Answer 3 · answered Jun 12 '13 at 06:15

0

On C++03 you can do:

std::wstringstream stream;
stream << dw;
wstr = stream.str();

answered Jun 12 '13 at 06:15

Jonas Byström

3 Answers3