Read hex in C# using IO

Question

I'm new to C# moving from Java. I'm trying to read in a file using IO in HEX. When I read the first byte in I don't get what I'm seeing in my Hex editor.

I'm using

StreamReader reader = new StreamReader(fileDirectory);
int hexIn;
String hex;

for (int i = 0; (hexIn = reader.Read()) != -1; i++){
    hex = Convert.ToString(hexIn, 16);
}

In Java I used

FileInputStream fis = new FileInputStream(file);
long length = file.length();

int hexIn;
String hex = "";

for(int i = 0; (hexIn = fis.read()) != -1; i++){

    String s = Integer.toHexString(hexIn);
    if(s.length() < 2){
        s = "0" + Integer.toHexString(hexIn);
    }

I hope this makes sense. Any help would be most apperciated :)

Thanks.

Answer 1

Don't use a StreamReader—that's only for characters in a certain encoding (default UTF8). Use a FileStream class instead:

FileStream fs = new FileStream(fileDirectory, FileMode.Open);
int hexIn;
String hex;

for (int i = 0; (hexIn = fs.ReadByte()) != -1; i++){
    hex = string.Format("{0:X2}", hexIn);
}