Question

I have a string entered by the user in the text box. I need to insert char ‘#’ in the string if not entered by the user.

expected format : aaa#aa#a

Here is the code to verify and correct the expected format:-

if user entered this: aaaaaa,

if (enteredtext.Length >= 7 && enteredtext.EndsWith(","))
            {
                if (enteredtext.IndexOf('#', 3, 3) == -1)
                    enteredtext = enteredtext.Insert(3, "#");
                if (enteredtext.IndexOf('#', 6, 6) == -1)
                    enteredtext= enteredtext.Insert(6, "#");
            }

Any other best way to achieve it?

Answer 1

Instead of if (enteredtext.IndexOf('#', 3, 3) == -1) you can just do:

if(enteredtext[3] != '#')
  enteredtext = enteredtext.Insert(3, "#");