Update Image using asp.net?

protected void Button1_Click1(object sender, EventArgs e)
    {
        SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["connectionstring"].ConnectionString);
        string strimage = @"~\ProductImages\" + FileUpload1.FileName;
        FileUpload1.PostedFile.SaveAs(Server.MapPath(strimage));
        String strInsert = "update SubmitTable set Photo=@Photo where EmailAddress=@EmailAddress";
        SqlCommand cmd = new SqlCommand(strInsert, con);

        SqlParameter Photo = new SqlParameter("@Photo", SqlDbType.NVarChar);
        Photo.Value = FileUpload1.FileBytes.ToString();
        cmd.Parameters.Add(Photo);

        SqlParameter EmailAddress = new SqlParameter("@EmailAddress", SqlDbType.NVarChar);
        EmailAddress.Value = Label1.Text.ToString();
        cmd.Parameters.Add(EmailAddress);

        try
        {
            con.Open();
            cmd.ExecuteNonQuery();
            
        }
        catch (SqlException ex)
        {

        }
        finally
        {
            con.Close();
        }
        Response.Redirect("Update.aspx");
    }