Regular expression - String followed by a date

Hi


Here i just did some code for your requirement.

this is just for testing only.

string Datestring = "Date of Birth : 07/12/1989";
   if (Datestring.IndexOf(':') > 0)
   {
       string datestr = Datestring.Split(':')[0];
       string datefrmt = Datestring.Split(':')[1];
        //you can test this based on REgEp also.
       if (datefrmt.IndexOf('/') > 0)
       {
           datefrmt = datefrmt.Trim();
           string date1 = datefrmt.Split('/')[0];
           string mnt = datefrmt.Split('/')[1];
           string yr = datefrmt.Split('/')[2];
           int datr, mntr, yre;
           if (int.TryParse(date1, out datr) && int.TryParse(mnt, out mntr) && int.TryParse(yr, out yre))
           {
               //entered string matched with one of date format
           }
       }
       else
       {
           if (datefrmt.IndexOf('-') > 0)
           {
               //Date of Birth : 07-Dec-1989
           }
           else
           {
               //Date of Birth : 07th Dec 1989
               string date1 = datefrmt.Split(' ')[1];
               string mnt = datefrmt.Split(' ')[2];
               string yr = datefrmt.Split(' ')[3];
               int datr, mntr, yre;
               int monthIndex;

               string[] MonthNames = CultureInfo.CurrentCulture.DateTimeFormat.MonthNames;
               monthIndex = Array.IndexOf(MonthNames, mnt) + 1;

               if (int.TryParse(date1.Replace("th",""), out datr) && (monthIndex>0) && int.TryParse(yr, out yre))
               {
                   //entered string matched with one of date format
               }
           }
       }
   }

In the above code you need to change some to achieve your requirement this is just for giving you idea how to do.

and i did exactly string what you want with white spaces also.

I hope you understood what I did.

you can reduce that code using Regular Expressions.

All the Best

Use the regex to match the label and the date text after the label. Then employ DateTime.TryParse(...). See the DateTime.TryParse(...)[^] - there are good examples about the issues on parsing "any" date format (basically: not possible in general: you have to make a choice on what culture(s) youo want to try parsing, and what the time zone is (it this is important to your solution).

var match = Regex.Match(s, "^Date of Birth\s*:\s*(.*?)\s*$");
if (match.Success)
{
    DateTime dt;
    if (DateTime(match.Groups[1].Value, out dt))
    {
        // store it
        ...
    }
    else
    {
        // try another culture or error
        ...
    }
}