Question

I have a string “Sunday”, i want to change this Polish(Poland) . How can i change. I try to use Iformateprovider

Answer 1

If you have some DateTime value dateTime, then you can use

dateTime.ToString("dddd")

to produce the day-of-week name in the current culture, or

dateTime.ToString("dddd", new CultureInfo("da-DK"))

to produce it in another culture (here Danish (Denmark)).

If you want the “source” of these day names, use

string[] dayNamesPolish = (new CultureInfo("pl-PL")).DateTimeFormat.DayNames;
string[] dayNamesEnglish = CultureInfo.InvariantCulture.DateTimeFormat.DayNames;

To actually translate a string, do this:

string stringToTranslate = "Sunday";
int idx = Array.IndexOf(dayNamesEnglish, stringToTranslate);
string stringResult = dayNamesPolish[idx];

This works even though the FirstDayOfWeek is not the same in the two cultures (Polish has Monday as the first day).