Binary file's hex value won't change using C#

Question

I have an issue where my C# code wasn't able to change a hex value in the 13th position.

See the screenshot from HxD Hex editor for further detail

This is C# my code:

private void button1_Click(object sender, EventArgs e)
{
    OpenFileDialog openFileDialog = new OpenFileDialog();
    if (openFileDialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
    {
        string fileName = openFileDialog.FileName;
        textBox1.Text = fileName;
    }
}

private void button2_Click(object sender, EventArgs e)
{
    string fileName = textBox1.Text;
    using (var stream = new FileStream(fileName, FileMode.Open, FileAccess.ReadWrite))
    {
        stream.Position = 13;
        stream.WriteByte(0x00);
    }
}

Chris H · Accepted Answer · 2021-09-25 02:26:21Z

1

you have stream.Position = 13; (13 is in decimal) Your picture is pointing to 13 hex (19 in decimal) so you'll need stream.Position = 0x13

answered Sep 25, 2021 at 2:26

Chris H

9725 silver badges9 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Binary file's hex value won't change using C#

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related