foreach (System.Data.Common.DbParameter p in e.Command.Parameters)
{
    if (p.DbType.Equals(System.Data.DbType.Int32) || p.DbType.Equals(System.Data.DbType.Decimal))
    {
        Response.Write("<br>set " + p.ParameterName + " = " + (p.Value == null ? "null" : p.Value.ToString()));
    }
    else
    {
        Response.Write("<br>set " + p.ParameterName + " = '" + (p.Value == null ? "null" : p.Value.ToString()) + "'");
    }
}
e.Cancel = true;

foreach (System.Collections.DictionaryEntry entry in e.Values)
        {
            Response.Write("<br>" + entry.Key.ToString() + " = " + (entry.Value == null ? "null" : entry.Value.ToString()));
        }
e.Cancel = true;