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I would like to convert hexadecimal value to ASCII/extended ASCII, but the ASCII characters do not properly how in Notepad++. Instead it shows as question mark(?)

Can anybody help me to convert hex to ASCII/extended ASCII?

What I have tried:

string p = "7E 3E 44 C2 80 0E C2 A0"; //"24A".PadLeft(8,'0');
var bytessss = p.Split(' ').Select(hb => Convert.ToByte(hb, 16)).ToArray(); // converts string -> byte using base 16
var asciiStr = System.Text.Encoding.ASCII.GetString(bytessss);
File.WriteAllText(@"test.txt", asciiStr, Encoding.ASCII);

Result for the above hex is: ~>D????
Updated 26-Jan-22 3:49am

1 solution

Those bytes do not represent a valid sequence of ASCII characters. You cannot use the ASCII encoding to process them.

You'll need to use the appropriate encoding for your text. For example:
  • ASCII: ~>D??0E??
  • ISO-8859-1: ~>D€0EÂ
  • UTF-8: ~>D€0E
  • Unicode: 㹾쉄຀ꃂ

None of these appear to be correct, so you'll need to find out which encoding was used to produce the source data.
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