-3

I am trying to convert different string date formats to a specific format i.e., YYYYMMDD and all the incoming dates are valid. How can I return a new list of strings representing this format

Mithun Kumar
  • 1
  • 3
  • for dates there's DateTime type in C#. and [here](https://learn.microsoft.com/ru-ru/dotnet/api/system.datetime.tostring?view=net-5.0) you can find how to convert it to string with formatting – ba-a-aton Jun 09 '21 at 12:56
  • 2
    A date 3/4/2000 could be a third of April or a fourth of March. Without additional hints it is impossible to know for sure which is it. – Dialecticus Jun 09 '21 at 12:56
  • Why do you want to convert it to a list of strings? A better choice would be to parse the input list into a list of DateTime instances. Types exist for a reason. – Igor Jun 09 '21 at 12:58

2 Answers2

0

Use DateTime.Parse() to get the date/time information into a standard DateTime object and then you can output it any way that you like.

https://learn.microsoft.com/en-us/dotnet/api/system.datetime.parse?view=net-5.0

Matt Small
  • 2,182
  • 1
  • 10
  • 16
0
public static List<string> TransformDateFormat(List<string> dates)
{
    var formats = new string[]
    {
        "yyyy/MM/dd",
        "dd/MM/yyyy",
        "MM-dd-yyyy",
        "yyyyMMdd"
    };

    return dates
        .Select(date => DateTime.ParseExact(date, formats, null).ToString("yyyyMMdd"))
        .ToList();
}

You must specify all possible formats.

Alexander Petrov
  • 13,457
  • 2
  • 20
  • 49