DateTime格式在InvariantCulture中的使用

Question

我必须在Javascript中预先验证一个字符串，这个字符串将是DateTime在c#中。DateTime解析使用InvariantCulture。

有人知道为DateTime定义的InvariantCulture格式吗？

Answer 1

很容易测试。

public static void Main()
{
    var d = DateTime.Now;

    Console.WriteLine("Date format (long):  {0}", d.ToString("D", CultureInfo.InvariantCulture));
    Console.WriteLine("Date format (short): {0}", d.ToString("d", CultureInfo.InvariantCulture));
    Console.WriteLine("Full format (long):  {0}", d.ToString("F", CultureInfo.InvariantCulture));
    Console.WriteLine("Full format (short): {0}", d.ToString("f", CultureInfo.InvariantCulture));
    Console.WriteLine("Time format (long):  {0}", d.ToString("T", CultureInfo.InvariantCulture));
    Console.WriteLine("Time format (short): {0}", d.ToString("t", CultureInfo.InvariantCulture));
    Console.WriteLine("General format (long):  {0}", d.ToString("G", CultureInfo.InvariantCulture));
    Console.WriteLine("General format (short): {0}", d.ToString("g", CultureInfo.InvariantCulture));
}

}

输出：

Date format (long):  Monday, 16 October 2017
Date format (short): 10/16/2017
Full format (long):  Monday, 16 October 2017 20:12:45
Full format (short): Monday, 16 October 2017 20:12
Time format (long):  20:12:45
Time format (short): 20:12
General format (long):  10/16/2017 20:12:45
General format (short): 10/16/2017 20:12

DotNetFiddle上的代码。

Answer 2

它与en-us大致相同，但使用的是24小时的时间，而不是12小时的上午/下午，并填写完整的MM/DD/YYYY。

var date1 = d.ToString(CultureInfo.InvariantCulture);   // "05/21/2014 22:09:28"
var date2 = d.ToString(new CultureInfo("en-US"));       // "5/21/2014 10:09:28 PM"

Answer 3

• "O“或"o"：yyyy-MM-ddTHH:mm:ss.fffffffzz
• "R“或"r"：ddd, dd MMM yyyy HH:mm:ss
• "s"：yyyy-MM-ddTHH:mm:ss
• "u"：yyyy-MM-dd HH:mm:ssZ

资料来源1：https://learn.microsoft.com/en-us/dotnet/standard/base-types/standard-date-and-time-format-strings