error "String was not recognized as a valid DateTime." in c#

Question

I have created an android application in which I have used android date picker. While submitting form in my application I am getting date in this format "18-2-2021" and I want to format this date in "18-Feb-2021" format. I don't want to force my user to update application so I want to format date in my c# web service code.

I am trying to format date using below code but I am getting "String was not recognized as a valid DateTime.".

DateTime requestRaisedDate = DateTime.ParseExact(ApplicationID.REQUEST_RAISED_DATE, "dd-MM-yyyy",System.Globalization.CultureInfo.InvariantCulture);

Tim Schmelter · Accepted Answer · 2021-02-18 11:23:22Z

With 18-2-2021 you need to allow single-digit months: dd-M-yyyy:

DateTime requestRaisedDate = DateTime.ParseExact(ApplicationID.REQUEST_RAISED_DATE, "dd-M-yyyy",System.Globalization.CultureInfo.InvariantCulture);

This allows 18-2-2021 and also 18-02-2021.

See: https://learn.microsoft.com/en-us/dotnet/standard/base-types/custom-date-and-time-format-strings#month-m-format-specifier

Thanks for your response. what will happen if I receive 25-10-2021 from mobile application because that time the month value is in two digit

Darshit Gandhi · Accepted Answer · 2021-02-18 11:06:58Z

DateTime requestRaisedDate = DateTime.ParseExact(ApplicationID.REQUEST_RAISED_DATE, "dd-M-yyyy",System.Globalization.CultureInfo.InvariantCulture);

Use Single M for single-digit month. It will support 10, 11,12 by default. So, don't worry

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