In C#, when reading the content of the text file, there are often many carriage return line breaks ("\r\n") inside. Although they are generally invisible, they actually exist. At this time, when using regular representations for matching, it needs to be considered. I encountered this problem today:
The text file content is as follows:
DT 20180101000000 WT -1.1 SL 31.4 WL 203 DT 20180101000000 AT -4.1 BP 1023.7 HU 26 RN 99999.9 WS 1.9 92 2.0 94 3.4 79 2111 4.6 83 2103
Use regular expressions: WT\s+(?<WT>.+)$, the result is that the matching value cannot be obtained. The reason is that the text content read has many carriage return line breaks " \r\n ". For example, in WT -1.1, the actual content is
“ WT -1.1\r\n ”, at this time the line ending character "$" does not work. It should be said that it is to read the file content directly and use regular expressions to match it, and it does not work.
Change the regular expression to:
WT\s+(?<WT>.+)\r\n
Summarize
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