正则表达式以匹配C＃中的模式

Question

I have a string in the following format

ABC=23:Qasd=56:Def=40.44

I would like to replace all the strings ( ABC= , Qasd= and Def= ) with empty string. The string after = can be anything. So my output string would be

23:56:40.44

It would be great if you can let me know the regex for that in C#

Answer 1

(^|:)[^=]*=

replaced with

$1

Matches the beginning of a string or a : and everything until and including = . It is replaced with $1 to keep : .

C#

string strTargetString = @"ABC=23:Qasd=56:Def=40.44";

var myRegex = new Regex(@"(^|:)[^=]*=");    
var result = myRegex.Replace(strTargetString, @"$1");

//result: 23:56:40.44

More examples:

ABC=hello:Qasd=56:Def=40.44 => hello:56:40.44

Answer 2

Match

^[^=]+=|(?<=:)[^=]+=

and replace with string.Empty

Regex.Replace("ABC=23:Qasd=56:Def=40.44", @"^[^=]+=|(?<=:)[^=]+=", string.Empty);