How can i Increment a specific Character in a string [Solved]

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I'm trying to encode a string by incrementing each char a certain amount. I've try'd this:

C#

public string EncodeString(string s)
        {
            string en = "";
            char g = '0';
            char t = '0';
            for (int i = 0; i <= s.Length; i++)
            {
                g = s[i];
                t = int(g + 25);
                en = en + t;
            }
            return en;
        }

but it gives me an error: invalid expression term int

Posted 31-Jul-12 13:06pm

JCZHD

Updated 31-Jul-12 13:47pm

v2

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Comments

Kenneth Haugland 31-Jul-12 19:07pm

s.Length -1 :=)

Peter_in_2780 31-Jul-12 19:29pm

You have a number of problems. The first is that strings are immutable in c#.

2 solutions

Solution 2

Try this:

C#

var c = '0';
var c2 = (char)(c + 1);

You can now use this concept with Linq to:

var s = new string("12345".Select(i => (char) (i + 25)).ToArray());

Posted 31-Jul-12 13:39pm

Clifford Nelson

Updated 31-Jul-12 13:46pm

v2

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virang_21 · Accepted Answer · 2012-07-31T13:36:00

C#

StringBuilder sb = new StringBuilder();
for (int i = 0; i < s.Length; i++)
            {
                sb.Append(Convert.ToChar(s[i] + 25));
            }
            return sb.ToString();

I am assuming you want to increment each character by 25 and convert it back to ASCI string. If just want to increment each character in string by 25 remove Convert.ToChar() function.

If you pass 12345 to above code you get back JKLMN.