What I need to do is this: let's assume the string is - > : .
However, I want to select "only" the string before : using Regex .
To get clearer:
" select this word : another word here"
Remembering that : should not be selected.
In this case REGEX will get everything up to the first one (:)
Match result = Regex.Match(text, @"^.*?(?=:)");
You can do without regex by capturing the index of the character : and then using the Substring method.
Example:
var str = "selecionar esta parte:outra coisa aqui";
var i = str.IndexOf(':');
if(i >= 0)
str = str.Substring(0, i);
Console.WriteLine(str);
There is a concept in regex that calls positive lookahead , that is, looking ahead.
.*(\w+)(?=:)
Look for a text that has a : in front of the text