如何将字符串转换为相同格式的datetime（datetime）？

Question

Here I want to convert date into string using tostring but when I convert it back, (string to datetime), the format is different.

 static void Main(string[] args)
    {
        string cc = "2014/12/2";
        DateTime dt = DateTime.Parse(cc);
        Console.WriteLine(dt);
        Console.ReadLine();
    }

expected output: 2014/12/2 But I get: 12/2/2014

Answer 1

将DateTime实例转换回string时，使用提供的格式调用ToString ：

Console.WriteLine(dt.ToString(@"yyyy/M/d");

Answer 2

string DateString = "06/20/1990";
IFormatProvider culture = new CultureInfo("en-US", true); 
DateTime dateVal = DateTime.ParseExact(DateString, "yyyy-MM-dd", culture);

This will be your desire output

udpated

string DateString = "20/06/1990";;
                IFormatProvider culture = new CultureInfo("en-US", true);
                DateTime dt = DateTime.ParseExact(DateString,"dd/mm/yyyy",culture);
                dt.ToString("yyyy-MM-dd");

Answer 3

try this

DateTime dt = DateTime.ParseExact(dateString, "ddMMyyyy", 
                              CultureInfo.InvariantCulture);
dt.ToString("yyyyMMdd");

Answer 4

use this:

    string cc = "2014/12/2";
    DateTime dt = DateTime.Parse(cc);
    string str = dt.ToString("yyyy/M/dd"); // 2014/12/02 as you wanted
    Console.WriteLine(str);
    Console.ReadLine();

Answer 5

you can use

string formattedDate= dt.ToString("yyyy/M/d");

For reverse you can use

DateTime newDate = DateTime.ParseExact("2014/05/22", "yyyy/M/d", null);

So if your expected output is like : 2014/12/2 you have to use

newDate.ToString("yyyy/M/d");

Answer 6

As you can read here , DateTime.ToString() uses CurrentCulture to decide how to format its output ( CurrentCulture of type CultureInfo provides information on how to format dates, currency, calendar etc. It is called locale in C++).

Thus, the simlplest solution as suggested by previous answers, is to use an overload of ToString() which accepts a format string, effectively overriding the CurrentCulture info:

dt.ToString(@"yyyy/MM/dd");

More on datetime formatting can be found here .

Answer 7

This is simple, You just need to use date pattern during display

string cc = "2014/12/2";
string datePatt = @"yyyy/MM/d";
DateTime dt = Convert.ToDateTime(cc);
Console.WriteLine(dt.ToString(datePatt));