Question

I am getting errors with the following:

var a = id.Substring(0,8).TrimEnd("0").Length

What I want to do is to take my string called id. Trucate it to eight characters and then check the length after taking away trailing “0”.

The error message is:

Error   2   The best overloaded method match for 'string.TrimEnd(params char[])' has some invalid arguments

I can’t see what I am doing wrong. Anyone have any ideas?

Answer 1

What you’re doing is wrong because you’re passing the .TrimEnd() method a string, instead of a char[] as the documentation mentions.

You need something like:

var a = id.Substring(0,8).TrimEnd(new char[]{'0'}).Length;

You can even pass in a single quoted character to make things more readable.

var a = id.Substring(0,8).TrimEnd('0').Length;