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Regular Expression RegEx? We have one!


#1

Not excited about NETMF yet? here is another one for you!

Yes yes we know, you want NETMF4.2 and we are working on it :slight_smile: No we do not have a set date yet.


#2

Until Regex arrives…

Is there a simpler was to do sscanf()?

I need to convert a time date string to a DateTime variable

  • Convert.ToDateTime() not supported in NETMF 4.1
  • Datetime.Parse not supported in NETMF 4.1

I have a hand crafted bit of code to strip out substrings and convert to int’;s etc ,

BUT

Is there a more elegant way?


#3

What about:


DateTime dt = new DateTime(int year, int month, int day, int hour, int minute, in second);


#4

I’m actually after the other way round:


DateTime dt = sscanf("23/11/2011 20:28:33.982");


#5

Instead of a one line .NET Framework call to

Convert.ToDateTime( "" ) 

.NET Micro Framework doesn’t support this so need to do something like:


  public static class _DateTimec
    {
        public static DateTime ToDateTime(string sDT)
        {
            DateTime T = DateTime.MinValue;
            try
            {
                int d, m, y, H, M, S, F;
                int pS, pE;

                //INT'L Format
                //Format:  "27/12/1969 15:41:30.789" or "1/1/2011 1:41:30"
                pS = 0;
                pE = sDT.IndexOf(@ "/");
                d = Convert.ToInt32(sDT.Substring(pS, pE - pS));
                pS = pE + 1;
                pE = sDT.IndexOf("/", pS);
                m = Convert.ToInt32(sDT.Substring(pS, pE - pS));
                pS = pE + 1;
                pE = sDT.IndexOf(" ", pS);
                y = Convert.ToInt32(sDT.Substring(pS, pE - pS));
                if (y < 2000)
                {
                    y = y + 2000;
                }

                pS = pE + 1;
                pE = sDT.IndexOf(":", pS);
                H = Convert.ToInt32(sDT.Substring(pS, pE - pS));

                pS = pE + 1;
                pE = sDT.IndexOf(":", pS);
                M = Convert.ToInt32(sDT.Substring(pS, pE - pS));


                pS = pE + 1;
                pE = sDT.IndexOf(".", pS);
                if (pE > -1)
                {
                    S = Convert.ToInt32(sDT.Substring(pS, pE - pS));


                    pS = pE + 1;
                    pE = sDT.Length;
                    F = Convert.ToInt32(sDT.Substring(pS, pE - pS));
                }
                else
                {
                    S = Convert.ToInt32(sDT.Substring(pS, sDT.Length - pS));
                    F = 0;
                }

                T = new DateTime(y, m, d, H, M, S, F);
            }
            catch(Exception)
            {
                T = DateTime.MinValue;
            }

            // In absence of Convert.ToDateTime or 
            // DateTime dt2 = DateTime.Parse(date, culture, System.Globalization.DateTimeStyles.AssumeLocal);
            return T;

        }
    }


#6

That would make a nice DateTime.Parse() extension method since that’s basically what you’ve built.