Substrings using regex grouping in C#

Question

I want to retrieve substrings from a string using regex.

Just for info : These string values are subjects in mails

String1 = "Acceptance :DT_Ext_0062-12_012ed2 [Describe]"

string2 = "Acceptance : DT_Ext_0062-12_012 (ed.2) , Describe"

string3 = "Acceptance of : DT_Ext_0062-12_012 (ed.2) , Describe to me"

Substrings:

sub1 = Acceptance            <Mail Type : like Reject or Accept>
sub2 = DT_Ext_0062-12_012    <ID : unique identifier>
sub3 = ed2                   <Edition of mail, like : ed1, ed2, ed3 ...so on>
sub4 = Describe              <Description of the mail>

How can i write regex(either seperately or one regex for both) for the above two strings to get the same output.

I think match groups can be used to retrieve the data. But i am quite new to regex.

Answer 1

Try this:

// string strTargetString = @"Acceptance :DT_Ext_0062-12_012ed2 [Describe]";
// string strTargetString = @"Acceptance : DT_Ext_0062-12_012 (ed.2) , Describe";
string strTargetString = @"Acceptance of : DT_Ext_0062-12_012 (ed.2) , Describe to me";

 const string strRegex = @"\.*:\s*(DT_Ext_\d{4}-\d{2}_\d{3})\s*\W*(ed)\.?(\d+)(\W*[,])?(.*)";


RegexOptions myRegexOptions = RegexOptions.IgnoreCase | RegexOptions.Multiline | RegexOptions.CultureInvariant;
Regex myRegex = new Regex(strRegex, myRegexOptions);


foreach(Match myMatch in myRegex.Matches(strTargetString))
{
    if(myMatch.Success)
    {
        // Add your code here
        var value = new {
            Value1 = myMatch.Groups[1].Value,
            Value2 = myMatch.Groups[2].Value,
            Value3 = myMatch.Groups[3].Value,
            Value4 = myMatch.Groups[5].Value,
        };
    }
}