Is there some api to format string in c++ /cx?

Question

in c# i can use System.String.Format() to deal with relative actions,and it's so convenient,

but in c++ i can't find some way to do the same thing?

although i can do it by myself, i just want to know is there some api to do this.

in my scenario, i bind a textblock with a double, and want to show two number after the decimal dot,but sometimes when the number is some like 10.20, it just shows 10.2, so i want to format it to 10.20.

Answer 1

C++/Cx is C++ so you can use your normal C++ techniques: convert the string to a C wchar_t* string and use the standard C formatting functions.

There is a code snippet that'll get you most of the way to a formatting function in the vsnwprintf_s docs. You'll want to change it to use wchar_t*s and to  stows the buffer back in a std::wstring or Platform::String rather than printf()ing it.

See Strings (C++/CX) for information about how strings work in C++/Cx and how to convert between various containers.

--Rob

Answer 2

well done, Rob, thank you , i get it~