How to convert any date format to yyyy-MM-dd

Question

My app parses a string data  extracts the date and identify the format of the date and convert it to yyyy-MM-dd   The source date could be anything lime dd-mm-yyyy  dd mm yyyy  mm-dd-yyyy  mm dd yyyy or even yyyy-MM-dd   Other than attempting different permutations and combinations using switch case  is there any other efficient way to do it   string sourceDate    31-08-2012   String Format   0 yyyy-MM-dd    sourceDate     The above code simply returns the same sourceDate  31-08-2012

User · Answer

This is your primary problem      The source date could be anything like dd-mm-yyyy  dd mm yyyy    mm-dd-yyyy  mm dd yyyy or even yyyy-MM-dd    If you re given 01 02 2013  is it Jan 2 or Feb 1  You should solve this problem first and parsing the input will be much easier   I suggest you take a step back and explore what you are trying to solve in more detail

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Try this code       lblUDate Text   DateTime Parse ds Tables 0  Rows 0   AppMstRealPaidTime   ToString    ToString  yyyy-MM-dd

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string sourceDateText    31-08-2012   DateTime sourceDate   DateTime Parse sourceDateText   dd-MM-yyyy   string formatted   sourceDate ToString  yyyy-MM-dd

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if  DateTime TryParse datetoparser  out dateValue        string formatedDate   dateValue ToString  quot yyyy-MM-dd quot

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You can write your possible date formats in array and parse date as following  public static void Main string   args                        string dd    quot 12 31 2015 quot     or 31 12 2015             DateTime startDate              string   formats      quot dd MM yyyy quot    quot dd M yyyy quot    quot d M yyyy quot    quot d MM yyyy quot                                    quot dd MM yy quot    quot dd M yy quot    quot d M yy quot    quot d MM yy quot    quot MM dd yyyy quot                             DateTime TryParseExact dd  formats               System Globalization CultureInfo InvariantCulture              System Globalization DateTimeStyles None  out startDate                                Console WriteLine startDate ToString  quot yyyy-MM-dd quot

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string DateString    11 12 2009   IFormatProvider culture   new CultureInfo  en-US   true    DateTime dateVal   DateTime ParseExact DateString   yyyy-MM-dd   culture     These Links might also Help you  DateTime ToString   Patterns  String Format for DateTime  C

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You can change your Date Format From dd MM yyyy to yyyy-MM-dd in following way   string date   DateTime ParseExact SourceDate   dd MM yyyy   CultureInfo InvariantCulture  ToString  yyyy-MM-dd      Here  SourceDate is variable in which you will get selected date

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Convert your string to DateTime and then use DateTime ToString  yyyy-MM-dd     DateTime temp   DateTime ParseExact sourceDate   dd-MM-yyyy   CultureInfo InvariantCulture   string str   temp ToString  yyyy-MM-dd

User · Answer

You will need to parse the input to a DateTime object and then convert it to any text format you want   If you are not sure what format you will get  you can restrict the user to a fixed format by using validation or datetimePicker  or some other component

[c#] How to convert any date format to yyyy-MM-dd

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