ASP.NET - image encrypt

i am using this fun for image encryption then save in sql....here how can pass image from this even to encryptbytes fun and how to save in sql
protected void bUpload_Click(object sender, EventArgs e)
    {
      fupBill.SaveAs(Server.MapPath(@"Upload\UploadBill\" + fupBill.FileName));
}

public static byte[] EncryptBytes(byte[] inputBytes, string passPhrase, string saltValue)
    {
        RijndaelManaged RijndaelCipher = new RijndaelManaged();

        RijndaelCipher.Mode = CipherMode.CBC;
        byte[] salt = Encoding.ASCII.GetBytes(saltValue);
        PasswordDeriveBytes password = new PasswordDeriveBytes(passPhrase, salt, "SHA1", 2);

        ICryptoTransform Encryptor = RijndaelCipher.CreateEncryptor(password.GetBytes(32), password.GetBytes(16));

        MemoryStream memoryStream = new MemoryStream();
        CryptoStream cryptoStream = new CryptoStream(memoryStream, Encryptor, CryptoStreamMode.Write);
        cryptoStream.Write(inputBytes, 0, inputBytes.Length);
        cryptoStream.FlushFinalBlock();
        byte[] CipherBytes = memoryStream.ToArray();

        memoryStream.Close();
        cryptoStream.Close();

        return CipherBytes;
    }