Picking specific amount of characters from a textbox

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I am trying to get a specific amount of typed characters in a texbox, the current code is as follows:

novaconfiguracao.CupomEstabelecimento = tb_NomeFantasia.Text.Substring(0,48).ToString();

In the case of being typed less than 48 or more than 48 pick up maximum 48.

c# .net string
  • 1

    And what is the doubt? You’re already doing what you say you want.

  • The problem is you’re making a mistake

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    @Brunorodrigues complete the question with all relevant details, please. Suggested reading: [Ask].

1 answer

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You need to take the lower value of the two. Either the 48 or the size of the string. If you try to take 48 characters and a string is less than this will give an index error.

Will it be so:

novaconfiguracao.CupomEstabelecimento = 
              tb_NomeFantasia.Text.Substring(0, Math.Min(tb_NomeFantasia.Text.Length, 48));

Behold working in the ideone. And in the .NET Fiddle. Also put on the Github for future reference.

I didn’t get that ToString() that you had placed.

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