C# RegEx problems - string to dictionary

Question

C# RegEx problems - string to dictionary

Markus Freitag 3,791

Hello,
I have this string. scanned=
[)>[RS]06[GS]PTVK1281257[GS]21P666[GS]11D201632[GS]Q60[GS]18VLMDM5[GS]1TAFJH0010-1[GS]13E5a[GS]1PW12R789B[GS]4LCN[GS][RS][EOT]]

With.

 Dictionary<string, string> results =  
            Regex.Matches(scanned, @"(?i)\](\d*[A-Z])(.+?)\[").Cast<Match>().ToDictionary(m => m.Groups[1].Value, m => m.Groups[2].Value);  
  
            System.Diagnostics.Trace.WriteLine(scanned);

Works not with

 [)>[RS]06[GS]PTVK1281257[GS]21P[GS]11D201632[GS]Q60[GS]18VLMDM5[GS]1TAFJH0010-1[GS]13E5a[GS]1PW12R789B[GS]4LCN[GS][RS][EOT]]

2P Prefix is wrong.

Can somebody help me, see the mistake for RegEx? Thanks in advance.
Problems, when the value is empty.

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Answer 1

Viorel 122.5K

Try another pattern:

@"(?i)\](\d*[A-Z])(.*?)\["

Markus Freitag 3,791

 string text = "[)>[RS]06[GS]PTVK1281257[GS]21P[GS]11D201632[GS]Q60[GS]18VLMDM5[GS]1TAFJH0010 - 1[GS]13E5a[GS]1PW12R789B[GS]4LCN[GS][RS][EOT]]";  
  
           Dictionary<string, string> results =  
           Regex.Matches(text, @"(?i)\](\d*[A-Z])(.*?)\[").Cast<Match>().ToDictionary(m => m.Groups[1].Value, m => m.Groups[2].Value);

You are right, thanks.

* means all, included empty, right?  
+  
.  
?

Can you explain something else? Thank you in advance.

Viorel 122.5K Reputation points

2021-08-11T19:39:57.523+00:00

Yes.

Yes.
Markus Freitag 3,791 Reputation points

2021-08-11T20:11:15.887+00:00

Ok, thanks.

What does .
What does?
do?

Do you know it ?
Last question, thanks
Viorel 122.5K Reputation points

2021-08-11T21:00:36.533+00:00
According to my knowledge:

‘.’ means “any character, excepting new-line (\n)”.

‘.*’ means “the longest series of characters (excepting new-line), maybe empty”.

‘.*?’ means “the shortest series of characters (excepting new-line), maybe empty”.

The documentation for Regex class explains these and other constructs too.
Timon Yang-MSFT 9,606 Reputation points

2021-08-12T01:45:46.317+00:00

@Markus Freitag
Microsoft provides a detailed document describing the syntax of Regex, please check it out.
Regular Expression Language - Quick Reference
Markus Freitag 3,791 Reputation points

2021-08-12T05:29:32.437+00:00

@Viorel , Thanks for your help!
Markus Freitag 3,791 Reputation points

2021-08-12T05:30:15.767+00:00

@Timon Yang-MSFT ,
Thanks for your help too!

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C# RegEx problems - string to dictionary

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