Parse stringto get final end result

Question

I'm trying to parse this string 'Smith, Joe M_16282' to get everything before the comma, combined with everything after the underscore.

The resulting string would be: Smith16282

Answer 1

string longName = "Smith, Joe M_16282";

string shortName = longName.Substring(0, longName.IndexOf(",")) + longName.Substring(longName.LastIndexOf("_") + 1);

Notes:

• The second "substring" doesn't need a length parameter, because we want everything after the underscore
• The LastIndexOf is used instead of IndexOf in case there are other underscores appearing in the name such as "Smith_Jones, Joe M_16282"
• This code assumes that there is at least one comma and at least one underscore in the string "longName." If not, the code fails. I will leave that checking to you if you need it.