'-'在使用正则表达式匹配特殊字符时不起作用，c＃

Question

Pattern is

Regex splRegExp = new System.Text.RegularExpressions.Regex(@"[\,@,+,\,?,\d,%,.,?,*,&,^,$,(,!,),#,-,_]");

All characters work except '-'. Please advise.

Answer 1

Use

@"[,@+\\?\d%.*&^$(!)#_-]"

No need for all those commas.

If you place a - inside a character class , it means a literal dash only if it's at the start or end of the class. Otherwise it denotes a range like AZ . As Damien put it, the range ,-, is indeed rather small (and doesn't contain the - , of course).

Answer 2

“-”必须是您的正则表达式中的第一个字符。

Regex splRegExp = new System.Text.RegularExpressions.Regex(@"[-,\,@,+,\,?,\d,%,.,?,*,&,^,$,(,!,),#,_]");

Answer 3

You need to escape the -character for it to work (it's a regular expression syntax)

Try this:

"[\,@,+,\,?,\d,%,.,?,*,&,^,$,(,!,),#,\-,_]"