过滤完整字符串匹配但不过滤子字符串

Question

So I've got a long string of numbers and characters and I'd like to filter out a substring. The thing I'm struggling with is that I need a full match on a certain value (starting with S) but this may not be matched in another value.

Input:

S10     1+0000000297472+00EURS100    1+0000000297472+00EURS1023P  1+0000000816072+00EUR

The input is exactly like this.

Breakdown of input:

S10     1+0000000297472+00EUR

• Every part starts with a tag S and ends with EUR
• There are spaces in between because every part has a fixed length

=>

• index 0 : tag 'S' with length 1
• index 1 : code with length 7
• index 8 : numbertype with length 1
• index 9 : sign with length 1
• index 10 : value with length 13
• index 23 : sign with length 1
• index 24 : exponent with length 2
• index 26 : unit with length 3

I need to match on for example S10 and I only want this substring till EUR. I don't want it to match on S100 or S1023P or any other combination. Only on exactly S10

Output:

S10     1+0000000297472+00EUR

I'm trying to use Regex to find my match on 'S + code'. I'm doing a full match on my search query and then as soon as anything follows I don't want it anymore. But doing it like this also discards the actual match as after the S10 the value will follow which will match with [^\\d|^\\D])+\\w

 foreach (var field in fieldList)
 {
     var query = "S" + field.BallanceCode;                                
     var index = Regex.Match(values, Regex.Escape(query) + @"([^\d|^\D])+\w").Index;
 }

For example when looking for S10

needs to match:

S10 1+0000000297472+00EUR

may not match:

S10/15  1+0000001748447+00EUR 
S1023P  1+0000000816072+00EUR
S10000001+0000000546546+00EUR

Update:

Using this code

var index = Regex.Match(values, Regex.Escape(query) + @"\p{Zs}.*?EUR").Index; 

wil yield S10, S10/15, etc when looked for. However looking for S1000000 in the string doesn't work because there is no whitespace between the code and 1+

S1000000 1+0000000546546+00EUR

For example when looking for S1000000

needs to match:

S10000001+0000000297472+00EUR

may not match:

S10     1+0000001748447+00EUR 
S1023P  1+0000000816072+00EUR
S10/15  1+0000000546546+00EUR

Answer 1

You can use a regex that requires a space (or whitespace) to appear right after the field.BallanceCode :

var index = Regex.Match(values, Regex.Escape(query) + (field.BallanceCode.Length < 7 ? @"\p{Zs}" : "") + ".*?EUR").Index;

The regex will match the S10 , then any horizontal whitespace ( \\p{Zs} ), then any 0 or more characters other than a newline (as few as possible due to *? ) up to the first EUR .

The (field.BallanceCode.Length < 7 ? @"\\p{Zs}" : "") check is necessary to support a 7-digit BallanceCode . If it contains 7 digits or more, we do not check if there is a whitespace after it. If the length is less than 7, we check for a space.

Answer 2

So you just want the start (S...) and end (...EUR) of each line and skip everything in between?

^([sS]\d+).*?([\d\+]+EUR)$

http://regexr.com/3c1ob