如何获取字符列表或列表中的特定字符<char></char>

Question

List<char> pc = new List<char>();
            pc.Add('?');
            pc.Add(';');
            pc.Add(',');

return pc.Contains(Convert.ToChar(temp)) ? pc[Convert.ToChar(temp)].ToString() : null;

(above code in the method which return string)

Normally in string list I get any specific value from List[] but in this it's changing the char into int.

example: pc['?'] == pc[63] due to this ArgumentOutOfRangeException occur.

So, how I get the specific char from my char list?

Thanks in advance

Answer 1

A char holds an integral value, but the index of your list is not equal to the value of the char it's holding. Your list looks like this, with [index] => value :

[0] => 63
[1] => 59
[2] => 44

You'll have to scan the list:

var charToFind = Convert.ToChar(temp);
char? match = pc.FirstOrDefault(c => c == charToFind);

If you want to know the index, ask for the index:

int index = pc.IndexOf(charToFind); // -1 for not found

But then if you have the desired char in temp (or charToFind ) already, there's no need to obtain it from the list again, you can just return the char if it's present in the list:

return pc.Contains(charToFind) ? charToFind.ToString() : null;