Find a uppercase letter in the text

Question

I’m doing some text checks for password.

I’ve already located for special character but I couldn’t find for high letter.

I used Regex. For example if the text contains "test" returns false and if it contains "test" returns true.

Can anyone tell me? If it works with Regex too?

I used this to check if my password field has a special character

ExisteCaracterEspecial = Regex.IsMatch(txt_senha.Text, ("[\[\]\^\$\.\|\?\*\+\(\)\\~`\!@#%&\-_+={}'""<>:;, ]{1,}"));

I am using VB.NET

Answer 1

It is possible to do this using the Any of LINQ also.

In VB.NET

• With LINQ

  Dim existeMaiuscula As Boolean = senha.Any(Function(c) Char.IsUpper(c)) 
  

• With Regex

  Dim existeMaiuscula As Boolean = Regex.IsMatch(senha, "\p{Lu}")
  

In C#

• With LINQ

  var existeMaiuscula = senha.Any(c => Char.IsUpper(c));
  

• With Regex

  var existeMaiuscula = Regex.IsMatch(senha, @"\p{Lu}");