What is regex of MM/DD/YYYY formate using CSV upload

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public static bool hasValidCharforDate(string input)
{
Regex r = new Regex("^(0[1-9]|[12][0-9]|3[01])[- /.](0[1-9]|1[012])[- /.](19|20)\\d\\d$.");

if (r.IsMatch(input))
{
return false;
}

return true;
}

What I have tried:

Please help me

i am trying to validate date and i need in mm/dd/yyyy format so please give me regex code

Posted 19-Sep-18 0:47am

Member 12183079

Updated 19-Sep-18 1:01am

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F-ES Sitecore · Answer 1 · 2018-09-19T01:01:00

Solution 1

Don't use regex to validate dates, use DateTime.TryParseExact.

DateTime dt;
string dateText = "01/30/2018";
bool valid = DateTime.TryParseExact(dateText, "MM/dd/yyyy", System.Globalization.CultureInfo.CurrentCulture, System.Globalization.DateTimeStyles.None, out dt);

Posted 19-Sep-18 1:01am

F-ES Sitecore

Comments

Member 12183079 19-Sep-18 7:03am

no actually i am validating so please give me regex code

F-ES Sitecore 19-Sep-18 7:08am

You can use the above code when validating. RegEx is for formats but dates are more than a format

01/30/2000 is valid
02/30/2000 is invalid

02/29/2020 is valid
02/29/2021 is invalid

Member 12183079 19-Sep-18 7:26am

please write code

F-ES Sitecore 19-Sep-18 7:54am

You can't use regex to validate dates.

Member 12183079 19-Sep-18 7:59am

i need code above code is not working