ConvertLettersInString

  • Thread starter Thread starter gh
  • Start date Start date
G

gh

I have a string of 20 characters. I would like to replace all the
letters, between the 3rd and 17th letters, with a Z. Is there a
function for this?

Thanks
 
No.

Depending upon what you want, you would have to code either:

string modified = original.Substring(0, 2) + "Z" + original.Length > 17
? original.Substring(17) : "";

or

StringBuilder sb = new StringBuilder(original.Substring(0,2));
for (int i = 2; i < Math.Min(17, original.Length); i++)
{
sb.Append("Z");
}
if (original.Length > 17)
{
sb.Append(original.Substring(17));
}
string modified = sb.ToString();

or something like that. :)
 
gh said:
I have a string of 20 characters. I would like to replace all the
letters, between the 3rd and 17th letters, with a Z. Is there a
function for this?

Thanks
Click to expand...

Here's how I'd do it:

using System;
using System.Text;
using System.Text.RegularExpressions;

namespace regex {
class Program {
static void Main(string[] args) {

string a = "abcdefghij1234567890"; // 20 chars.

string b = Regex.Replace(
a, @"^(\w{3})(.{14})(\w{3})$", "$1ZZZZZZZZZZZZZZ$3"
);

Console.WriteLine("before: " + a);
Console.WriteLine("after : " + b);

}
}
}
 
gh said:
I have a string of 20 characters. I would like to replace
all the letters, between the 3rd and 17th letters, with a Z.
Is there a function for this?
Click to expand...

Yes, you need to call the String.ReplaceThirdToSeventeenthWithZed()
method.

P.
 
Paul E Collins said:
Yes, you need to call the String.ReplaceThirdToSeventeenthWithZed()
method.
Click to expand...

In the USA you need to use ReplaceThirdToSeventeenthWithZee() method
otherwise you will get an error 1776.

SP
 
Actually, if you want to use a StringBuilder, there is an overload of the
StringBuilder.Replace() method that takes an index and a count. Example:

StringBuilder sb = new StringBuilder("AAAAAAAAAAAAAAAAAAAA");
return sb.Replace(sb.ToString().Substring(3, 14),
"ZZZZZZZZZZZZZZ").ToString();
// returns "AAAZZZZZZZZZZZZZZAAA"

--
HTH,

Kevin Spencer
Microsoft MVP
..Net Developer
Ambiguity has a certain quality to it.
 
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