批量加入-拼接sql字符串

Posted 2020-10-01 liguangsunls

        如今做的一个项目须要用到批量加入，可是封装的底层没有这种方法，所以自食其力，自己来写。我们用的是拼接sql字符串的方法来实现功能。

     详细实现流程：首先将须要的数据存储到实体的list中，然后将这个list传给我们批量加入的方法。批量加入的方法首先应该打开数据库连接，然后開始进行sql字符串的拼接，拼接完毕后。调用sqlhelper方法进行加入。

      详细代码例如以下：

        #region 批量加入实体
        /// <summary>
        /// 批量加入实体
        /// </summary>
        /// <param name="staffscores"></param>
        /// <returns></returns>
        public bool Insert(List<YzQueryStaffScoresEntity> staffscores)
        {
            //打开数据库连接
            SQLHelper sqlHelper = new SQLHelper("data source=192.168.22.239;initial catalog=YzEvaluationSystem;persist security info=True;user id=sa;password=xxx;", true);

            StringBuilder sbSql = new StringBuilder();

            //拼接字符串，加入方法
            sbSql.Append("insert into YzQueryStaffScoresEntity(ID,StaffID,StaffName,WorkEfficiency,ProfessionalEthics,BusinessAbility,HonestyDiscipline,WorkPerformance,other1,other2,Number,TotalScores,IsUsed) values");


            //循环实体list，进行拼接
            if (staffscores.Count > 1)
            {
                for (int i = 0; i < staffscores.Count - 1; i++)
                {
                    sbSql.Append("('" + staffscores[i].ID + "',");
                    sbSql.Append("'" + staffscores[i].StaffID + "',");
                    sbSql.Append("'" + staffscores[i].StaffName + "',");
                    sbSql.Append(staffscores[i].WorkEfficiency + ",");
                    sbSql.Append(staffscores[i].ProfessionalEthics + ",");
                    sbSql.Append(staffscores[i].BusinessAbility + ",");
                    sbSql.Append(staffscores[i].HonestyDiscipline + ",");
                    sbSql.Append(staffscores[i].WorkPerformance + ",");
                    sbSql.Append(staffscores[i].other1 + ",");
                    sbSql.Append(staffscores[i].other2 + ",");
                    sbSql.Append(staffscores[i].Number + ",");
                    sbSql.Append(staffscores[i].TotalScores + ",");
                    sbSql.Append(1);
                    sbSql.Append("),");
                }
                sbSql.Append("('" + staffscores[staffscores.Count - 1].ID + "',");
                sbSql.Append("'" + staffscores[staffscores.Count - 1].StaffID + "',");
                sbSql.Append("'" + staffscores[staffscores.Count - 1].StaffName + "',");
                sbSql.Append(staffscores[staffscores.Count - 1].WorkEfficiency + ",");
                sbSql.Append(staffscores[staffscores.Count - 1].ProfessionalEthics + ",");
                sbSql.Append(staffscores[staffscores.Count - 1].BusinessAbility + ",");
                sbSql.Append(staffscores[staffscores.Count - 1].HonestyDiscipline + ",");
                sbSql.Append(staffscores[staffscores.Count - 1].WorkPerformance + ",");
                sbSql.Append(staffscores[staffscores.Count - 1].other1 + ",");
                sbSql.Append(staffscores[staffscores.Count - 1].other2 + ",");
                sbSql.Append(staffscores[staffscores.Count - 1].Number + ",");
                sbSql.Append(staffscores[staffscores.Count - 1].TotalScores + ",");
                sbSql.Append(1);
                sbSql.Append(")");
            }
            //调用sqlhelper方法进行加入。
            int flag = sqlHelper.ExecuteNonQuery(sbSql.ToString(), System.Data.CommandType.Text);
            if (flag > 0)
            {
                return true;
            }
            else
            {
                return false;
            }


        }
        #endregion

     一開始说要自己写sql拼接字符串的时候还认为，哇塞，这肯定特别难。我光听说了，从来没有见过啊。结果一见之下。发现很的简单。

所以。不怕不知道，就怕不知道！各位加油