CODEWITHSUNDEEP
c#windows-phone-7if-statementwindows-phone-8
Romasz
Romasz

Reputation: 29792

Different behaviour dependent on if statement construction

I'm a little confused with a small pice of code - I created my own solution to the problem asked here - on KeyUp event I perform some check ups and then add a space or remove a character:

private void myTextbox_KeyUp1(object sender, System.Windows.Input.KeyEventArgs e)
{
   string text = myTextbox.Text;
   if (text.Length > 3)
   {
      if (e.Key == System.Windows.Input.Key.Back)
      {
         if (text.Length % 5 == 4) text = text.Substring(0, text.Length - 1); 
      }
      else if ((text.Length - (text.Length / 5)) % 4 == 0) text += " ";
   }
   myTextbox.Text = text;
   myTextbox.SelectionStart = text.Length;
}

The code works just fine. But if I only change the interior if statement to something like this (combine two if statements):

if (e.Key == System.Windows.Input.Key.Back && text.Length % 5 == 4)
   text = text.Substring(0, text.Length - 1);

The code stops working when I have more than 10 characters and then try to delete, I'm not able to delete the tenth character (space).

Upvotes: 0

Views: 72

Answers (1)

Patrick
Patrick

Reputation: 418

I think it is because, by combining the 2 if statements, you go into the else if, thus adding a space

10 - (10/5) % 4 does equal 0, so add a space.

Upvotes: 1

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