How do I include a hyphen in a Regex hyperlink?

Question

I try to find links in the text entered by the user and automatically convert them to a link.

I use the current Regex as the following, which is useful for finding hyperlinks from text.

Regex regexResolveUrl = new Regex("((http://|www\\.)([A-Z0-9.-:]{1,})\\.[0-9A-Z?;~&#=\\-_\\./]{2,})", RegexOptions.Compiled | RegexOptions.IgnoreCase);

It works well for almost all links while I stumbled, but this is a problem when I want to detect links with hypen.

i.e. www.abc-xyz.com will not work using regex, can anyone help me with this?

Answer 1

Reset the hyphen:

 Regex("((http://|www\\.)([A-Z0-9.\-:]{1,})\\.[0-9A-Z?;~&#=\\-_\\./]{2,})", RegexOptions.Compiled | RegexOptions.IgnoreCase);

Answer 2

, - , ( ) . , [abc-] - , 4 , a, b, c, -. , [ab-c] 3 , -, - - .

, - ( ):

[A-Z0-9.-:]

3 : a Z 0 9 . (ASCII 46) : (ASCII 58). :

[A-Z0-9.:-]

• regular-expressions.info/Character Class

---

, {1,} " ".

.NET regex ( ) :

• ?: "zero-or-one" {0,1}
• *: "zero-or-more" {0,}
• +: " " {1,}

, .

• regular-expressions.info/Repetition

• ,

---

# @ -

, . Java ( ), # @ - .

:

"(http://|www\\.)"
@"(http://|www\.)"

"c:\\Docs\\Source\\a.txt"
@"c:\Docs\Source\a.txt"

@ , (, , ).

• MSDN/#/ string

Answer 3

Add a hyphen as the first or last character in the character class.