检查字符串是否包含超过3个小数点的版本

Question

I am trying to get a the sub releases of a program, and this returns the following string Release 4.2.3 of programX but also sometimes: Release 4.3 of programX . I want to do a check if the string contains 3 or more decimal places (like 4.3.2).
I found This question with answer but it's not for C#, is this possible in C# and if so what would be the best approach?

Answer 1

Use linq.

bool more3dec = input.Count(c => c == '.') >= 2;

Or regex. (Checking only points within numeric part)

bool more3dec = Regex.IsMatch(input, @"\d+\.\d+\.\d+");

Answer 2

you can do this quite a view ways but if you want to know if it have 2 periods . or not then you can do this for instance.

var versionStr = "Release 4.2.3";
var nuberDecimals = versionStr.Split('.').Length - 1;

nuberDecimals = 2;

Answer 3

var input = "Release 4.2.3 andSomeText.With.Dots.Or.Namespaces";
var isValid = Regex.IsMatch(input.Split(' ')[1], @"\d+\.\d+\.\d+");