C#： MySqlHelper 操作Mysql數據庫，將dataset內的數據存入Mysql

 public class MySqlDbHelper
    {

        #region 私有變量
        private const string defaultConfigKeyName = " Database='sensetechtest';Data Source='127.0.0.1';User Id='root';Password='1234';pooling=true";//連接字符串 Database='數據庫';Data Source='IP地址';User Id='sa';Password='sa';pooling=true
        private string connectionString = " Database='sensetechtest';Data Source='127.0.0.1';User Id='root';Password='1234';pooling=true";
        private string providerName = " Database='sensetechtest';Data Source='127.0.0.1';User Id='root';Password='1234';pooling=true";

        #endregion

        #region 構造函數

        /// <summary>
        /// 默認構造函數(DbHelper)
        /// </summary>
        public MySqlDbHelper()
        {
            //this.connectionString = ConfigurationManager.ConnectionStrings[defaultConfigKeyName].ConnectionString;
            //this.providerName = ConfigurationManager.ConnectionStrings[defaultConfigKeyName].ProviderName;
        }

        /// <summary>
        /// DbHelper構造函數
        /// </summary>
        /// <param name="keyName">連接字符串名</param>
        public MySqlDbHelper(string keyName)
        {
            this.connectionString = ConfigurationManager.ConnectionStrings[keyName].ConnectionString;
            this.providerName = ConfigurationManager.ConnectionStrings[keyName].ProviderName;
        }

        #endregion

        public int ExecuteNonQuery(string sql, params MySqlParameter[] parameters)
        {
            int res = 0;
            using (MySqlConnection con = new MySqlConnection(connectionString))
            {
                con.Open();
                using (MySqlCommand cmd = new MySqlCommand(sql, con))
                {
                    foreach (MySqlParameter parameter in parameters)
                    {
                        cmd.Parameters.Add(parameter);
                    }
                    try
                    {
                        res = cmd.ExecuteNonQuery();
                    }
                    catch
                    {
                        res = -1;
                    }
                }
            }
            return res;
        }

        public object GetExeScalar(string sql, params MySqlParameter[] parameters)
        {
            object res = null;
            using (MySqlConnection con = new MySqlConnection(connectionString))
            {
                con.Open();
                using (MySqlCommand cmd = new MySqlCommand(sql, con))
                {
                    foreach (MySqlParameter parameter in parameters)
                    {
                        cmd.Parameters.Add(parameter);
                    }
                    res = cmd.ExecuteScalar();
                }
            }
            return res;
        }

        public DataTable GetDataTable(string sql, params MySqlParameter[] parameters)
        {
            DataSet dataset = new DataSet();
            using (MySqlConnection con = new MySqlConnection(connectionString))
            {
                con.Open();
                using (MySqlCommand cmd = new MySqlCommand(sql, con))
                {
                    foreach (MySqlParameter parameter in parameters)
                    {
                        cmd.Parameters.Add(parameter);
                    }
                    MySqlDataAdapter adapter = new MySqlDataAdapter(cmd);
                    adapter.Fill(dataset);
                }
            }
            return dataset.Tables[0];
        }

        /// <summary>
        /// DataTable批量加入MYSQL數據庫
        /// </summary>
        /// <param name="dataTable"></param>
        /// <returns></returns>
        public string InsertByDataTable(DataTable dataTable)
        {
            string result = string.Empty;
            if (null == dataTable || dataTable.Rows.Count <= 0)
            {
                return "添加失敗！DataTable暫無數據！";
            }
            if (string.IsNullOrEmpty(dataTable.TableName))
            {
                return "添加失敗！請先設置DataTable的名稱！";
            }
            // 構建INSERT語句
            StringBuilder sb = new StringBuilder();
            sb.Append("INSERT INTO " + dataTable.TableName + "(");
            for (int i = 0; i < dataTable.Columns.Count; i++)
            {
                sb.Append(dataTable.Columns[i].ColumnName + ",");
            }
            sb.Remove(sb.ToString().LastIndexOf(','), 1);
            sb.Append(") VALUES ");
            for (int i = 0; i < dataTable.Rows.Count; i++)
            {
                sb.Append("(");
                for (int j = 0; j < dataTable.Columns.Count; j++)
                {
                    sb.Append("'" + dataTable.Rows[i][j] + "',");
                }
                sb.Remove(sb.ToString().LastIndexOf(','), 1);
                sb.Append("),");
            }
            sb.Remove(sb.ToString().LastIndexOf(','), 1);
            sb.Append(";");
            int res = -1;
            using (MySqlConnection con = new MySqlConnection(connectionString))
            {
                con.Open();
                using (MySqlCommand cmd = new MySqlCommand(sb.ToString(), con))
                {
                    try
                    {
                        res = cmd.ExecuteNonQuery();
                    }
                    catch (Exception ex)
                    {
                        res = -1;
                        // Unknown column 'names' in 'field list' 
                        result = "操作失敗！" + ex.Message.Replace("Unknown column", "未知列").Replace("in 'field list'", "存在字段集合中！");
                    }
                }
            }
            if (res > 0)
            {
                result = "恭喜添加成功!";
            }
            return result;
        }
    }