Get Next Character in c#

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How to Get Next Character in C# Win. Form. Like if

i have A it should give B
i have a it should give b
i have 8 it should give 9
i have ! it should give "

and if reaches the last character of ASCII gives message "Done".

Thanks in advance

[Note: if i try

nextChar = ((char)(ASCIICode + 1));

and ASCIICode reaches above 255 it doesn't give any error and keeps on displaying the result. Why this is so?]

Posted 8-Mar-14 4:59am

agent_kruger

Updated 8-Mar-14 18:06pm

v2

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Peter Leow · Answer 1 · 2014-03-08T05:59:00

C#

using System;

public class Program
{
    public static void Main()
    {
        //char c = (char)127; // last ascii character
        char c = 'A';

        if ((int)c == 127) // check for last ascii character
        {
            Console.WriteLine("Done");
        }
        else
        {
            char result = getNextChar(c);

            Console.WriteLine("I have " + c + " it should give " + result);
        }
    }

    private static char getNextChar(char c){

        // convert char to ascii
        int ascii = (int)c;
        // get the next ascii
        int nextAscii = ascii + 1;
        // convert ascii to char
        char nextChar = (char)nextAscii;
        return nextChar;
    }
}

CHill60 · Answer 2 · 2014-03-08T05:44:00

Further to solution 1 it also depends on what you mean by "the last character of ASCII" - this may depend on the Code Page in use. A discussion here[^] explains it better than me.

This little function will valiantly try to find the next printable character

C#

private char NextLetter(char letterIn)
{
    int a = (int)letterIn + 1;

    char ret;
    if (char.IsLetterOrDigit((char)a) || char.IsSymbol((char)a) || char.IsPunctuation((char)a))
        ret = ((char)a);
    else
    {
         ret = NextLetter((char)a);
    }
    return ret;
}

Calling it from a too-large loop skips the non-printable stuff ... i.e. output starts at "!"
E.g.

C#

for (int i = 0; i < 300; i++)
    Debug.Print(NextLetter((char)i).ToString());

Abhinav S · Answer 3 · 2014-03-08T05:08:00

Solution 1

Try the following -

C#

if (letter == 'z')
    nextChar = 'a';
else if (letter == 'Z')
    nextChar = 'A';
else
    nextChar = (char)(((integer) letter) + 1);

Posted 8-Mar-14 5:08am

Abhinav S

Comments

agent_kruger 9-Mar-14 0:01am

sir, i searched through the article where you picked the code from but here i want after last character of ASCII gives message "Done". How to do the last part?

Get Next Character in c#

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