I have a problem in displaying the picture which is stored in my MySQL database. I don't know if I have stored it successfully but using this function which converts image to a blob file, here is the function:

private byte[] imageToByteArray(Image imageIn)
{
    MemoryStream ms = new MemoryStream();
    imageIn.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);
    return ms.ToArray();
}

When I check my database, it says BLOB with blue highlight. Now, I would like to display the image in my picturebox. I have also a function to convert byte array to image..

private Image byteArrayToImage(byte[] byteArrayIn)
{
    MemoryStream ms = new MemoryStream(byteArrayIn);
    ms.Position = 0;
    Image returnImage = Image.FromStream(ms);
    return returnImage;
}

When I run the application, it says:

ArgumentException was unheld, Parameter is not valid

I have tried using this syntax:

pictureBox1.Image = byteArrayToImage(dr["img"] as byte[]);

Or I'm thinking if I should convert BLOB to Byte Array first? then use the function to convert the byte array into Image?
when I click the name, it should display the information, unfortunately, I'm receiving the argument exception..

int i = dataGridView1.SelectedCells[0].RowIndex;
string firstname = dataGridView1.Rows[i].Cells[0].Value.ToString();
string lastname = dataGridView1.Rows[i].Cells[1].Value.ToString();

Connection connect = new Connection();
MySqlConnection mySqlConnect = new MySqlConnection(connect.connString());
mySqlConnect.Open();

string s = "SELECT * FROM tbl_contacts WHERE username = '" + label1.Text + "' and (fname = '" + firstname + "' and lname = '" + lastname + "')";

MySqlCommand mySQL = new MySqlCommand(s, mySqlConnect);
mySQL.ExecuteNonQuery();
MySqlDataReader dr = mySQL.ExecuteReader();

if (dr.HasRows)
{
    dr.Read();
    txtFname.Text = dr["fname"].ToString();
    txtLname.Text = dr["lname"].ToString();
    txtBday.Text = dr["birthday"].ToString();
    txtEmail.Text = dr["email"].ToString();
    txtMobile.Text = dr["mobile"].ToString();
    txtAddress.Text = dr["address"].ToString();
    txtNotes.Text = dr["notes"].ToString();
    pictureBox1.Image = byteArrayToImage(dr["img"] as byte[]);
}