How to solve system.overflowexception error

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I have written the following code which is converting string to byte array so in that code when i gave input string in English i get correct output but when i gave string in Japanese i'm getting error. Can anyone please solve this issue.

<pre> public class name
{
     public static void Main()
    {
    
        string str = "出衣紅詩弥";
        byte[] byt = new byte[str.Length];
        for (int i = 0; i < str.Length; i++)
        { 
            byt[i] = Convert.ToByte(str[i]);
        }
         for(int i =0; i<byt.Length; i++)
        {
            Console.WriteLine("Byte of char "+ str[i] + "\' :" +byt[i]);
        }
  
    }
}

Getting error like this:

Unhandled Exception:
System.OverflowException: Value was either too large or too small for an unsigned byte.
at System.Convert.ThrowByteOverflowException () [0x00000] in <533173d24dae460899d2b10975534bb0>:0 
  at System.Convert.ToByte (System.Char value) [0x00008] in <533173d24dae460899d2b10975534bb0>:0 
  at name.Main () [0x00021] in <eba12a16001248a19f09d95e0b7b46aa>:0 
[ERROR] FATAL UNHANDLED EXCEPTION: System.OverflowException: Value was either too large or too small for an unsigned byte.
  at System.Convert.ThrowByteOverflowException () [0x00000] in <533173d24dae460899d2b10975534bb0>:0 
  at System.Convert.ToByte (System.Char value) [0x00008] in <533173d24dae460899d2b10975534bb0>:0 
  at name.Main () [0x00021] in <eba12a16001248a19f09d95e0b7b46aa>:0

What I have tried:

I tried but i didn't get it. Can someone please review the code and try to solve this issue.

Posted 21-Jun-22 7:17am

Member 15682479

Updated 21-Jun-22 23:28pm

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RickZeeland · Accepted Answer · 2022-06-21T07:31:00

Solution 1

As Japanese is Unicode and uses several bytes per character, you can not simply convert that to bytes.
You might use the Encoding.Convert Method (System.Text) | Microsoft Docs[^]

If you want to get a byte array you could use:

var byt = Encoding.Unicode.GetBytes(str);

Where one Japanese character occupies several bytes in the array.

Also see: C# : Japanese characters with unicode encoding - Stack Overflow[^]

Posted 21-Jun-22 7:31am

RickZeeland

Updated 21-Jun-22 20:29pm

v3

Comments

Member 15682479 22-Jun-22 7:17am

Yeah i got the answer, thanks for taking time to helping me out in this. Yeah definitely i will go through that documents what you mentioned. Thank you.

Member 13566383 · Accepted Answer · 2022-06-21T23:28:00

Solution 2

Try this:

string str = "出衣紅詩弥";
var byt = System.Text.Encoding.Unicode.GetBytes(str);
                
for (int i = 0; i < str.Length; i++)
{
     Console.WriteLine("Byte of char " + str[i] + "\' :" + byt[2 * i]  + "  " + byt[2 * i + 1]);
}

You get two bytes for every Japanese character.

Posted 21-Jun-22 23:28pm

Member 13566383

Comments

Member 15682479 22-Jun-22 7:23am

Yeah its working, Thank you for the help.