ADO.NET操作PostgreSQL：数据库操作类(未封装)

1.添加

        /// <summary>
        /// 添加
        /// </summary>
        /// <param name="newEntity"></param>
        /// <returns></returns>
        public static int Insert(Person newEntity)
        {
            string sql = @"insert into ""Person"" (""PersonId"",""IdCard"",""RealName"",""Gender"",""Address"") values (@PersonId,@IdCard,@RealName,@Gender,@Address)";
            using (NpgsqlConnection conn = new NpgsqlConnection(postgresqlconn.connectionString))
            {
                using (NpgsqlCommand cmd = new NpgsqlCommand(sql, conn))
                {
                    #region MyRegion
                    cmd.Parameters.Add("@PersonId", NpgsqlDbType.Integer).Value = newEntity.PersonId;
                    cmd.Parameters.Add("@IdCard", NpgsqlDbType.Varchar).Value = newEntity.IdCard ?? (object)DBNull.Value;
                    cmd.Parameters.Add("@RealName", NpgsqlDbType.Varchar).Value = newEntity.RealName ?? (object)DBNull.Value;
                    cmd.Parameters.Add("@Gender", NpgsqlDbType.Bit).Value = newEntity.Gender;
                    cmd.Parameters.Add("@Address", NpgsqlDbType.Varchar).Value = newEntity.Address ?? (object)DBNull.Value;
                    #endregion

                    conn.Open();
                    return cmd.ExecuteNonQuery();
                }
            }
        }

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