CODEWITHSUNDEEP
c#regexstring
Maxime4000
Maxime4000

Reputation: 87

Extract value with a specific pattern

I found this some time ago but I can't find it now.

I want to parse GPS coordinates having the format "44°59'59.93\" N " in C# to get an array of every value. Ex: 

    degree:44
    minutes:59
    seconds:59.93
    direction:"N"

I think the solution must be like a regex or a pattern like "{0}°{1}'{2}\"{3}", but I have no clue what function to use for splitting this GPS coordinate into an array.

Upvotes: 0

Views: 152

Answers (2)

Eric Hughes
Eric Hughes

Reputation: 841

You can use capture groups to get the parts you're asking about.

string value = @"44°59'59.93"" N";
var match = Regex.Match(value, @"(\d+)°(\d+)'([\d\.]+"")\s*([NSEW])");
if (m.Success) {
    //note that these are all strings and will need to be parsed into ints/doubles
    var degrees = m.Groups[0];
    var minutes = m.Groups[1];
    var seconds = m.Groups[2];
    var direction = m.Groups[3];
}

Breaking this down:

  • (..) signify a "group"--part of the match that can be referred to as a contiguous chunk or substring. (like the opposite of {0} placeholders)
  • \d will match a digit.
  • + means "one or more", thus \d+ means "one or more digits"
  • [..] signify a choice of any of the things in the brackets (for the simple case)
  • \s means "whitespace"
  • * means "zero or more". Thus, \s* means "there might be some spaces in here, go ahead and take them"

You may want to add some extra \s*s in there to catch spaces if there are any.

Upvotes: 0

Avinash Raj
Avinash Raj

Reputation: 174706

Split your input according to the below regex.

string[] lines = Regex.Split(value, @"[°'""] *");

Then get the degree from index 0, minutes from index 1, seconds from index 2, Direction from index 3.

Ideone

Upvotes: 3

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