Save (Insert) record in database in ASP.Net using jQuery Ajax

How to record save in databse using ajax

below my code check in google crome console mode. no error show. but reocrd not save in database. pls check

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script type="text/javascript">
$(function () {
    $('[id*=btncoment]').on('click', function  () {
        var comment = $(this).closest('tr').find('.comment').val();
        var postid1 = $(this).closest('tr').find('[id*=hfpostid]').val();
        $.ajax({
            type: "POST",
            dataType: "json",
            contentType: "application/json; charset=utf-8",
            url: "Default12.aspx/SaveBookDetails",
            data: "{'comment':'" + comment + "', 'p_id':'" + postid1 +  "'}",
            success: function (response) {
                alert("Comment  has been added successfully.");
                window.location.reload();
            }
        });
    });
});
</script>

public static bool SaveBookDetails(string comment, string postid)
{
    bool status;
 
    using (SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["fbookConnectionString"].ConnectionString))
    {
        using (SqlCommand cmd = new SqlCommand("SP_SAVECOMMENT", con))
        {
            cmd.CommandType = CommandType.StoredProcedure;
            cmd.Parameters.AddWithValue("@CommentMessage", comment);
            cmd.Parameters.AddWithValue("@p_id", postid);
 
            if (con.State == ConnectionState.Closed)
            {
                con.Open();
            }
            Int32 retVal = cmd.ExecuteNonQuery();
            if (retVal > 0)
            {
                status = true;
            }
            else
            {
                status = false;
            }
            return status;
        }
    }
}