如何从字符串中解析链接

Question

I have a string like "Go to stack overflow http://stackoverflow.com " Now I want to parse link from this string using c#. I wants the output in the following format. " Go to stack overflow <a href=http://stackoverflow.com target=_blank>http://stackoverflow.com</> "

Is it possible in C#?

Answer 1

Use regular expression with this pattern ^(https?://)?(([0-9a-z_.'():&=$%-]? ).[0-9a-z_?'(),&=$%-]@).(([0-9]{1,3}\.){3}[0-9]{1,3}|([0-9a-z_?'()-]\.)([0-9a-z][0-9a-z-]{0,61}):[0-9a-z]\,[az]{2?6})(?[0-9]{1.4});((/?)|(/[0-9a-z_:*'(),??:@&=$,%#-])/?)$

Answer 2

var input = @"Go to stack overflow http://stackoverflow.com";
var result = Regex.Replace(input, 
    @"((?<Protocol>\w+):\/\/(?<Domain>[\w@][\w.:@]+)\/?[\w\.?=%&=\-@/$,]*)",
    @"Go to stack overflow <a href=$1 target=_blank>$1</>");

---

Output:

Go to stack overflow Go to stack overflow <a href=http://stackoverflow.com target=_blank>http://stackoverflow.com</>