UA Command自建连接数据库类

DbHelperMySQL.cs

using Dapper;
using Dapper.Contrib;
using Dapper.Contrib.Extensions; 
using Nancal.Model;
using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Xml.Linq;

namespace Nancal.DBUtility
{

    public class DBHelperMySQL
    {
        #region Property

        //private static readonly string ConnectionString = ConfigurationManager.AppSettings["BaseDb"];
        private static IDbConnection ReadingFunctionGetSQLDBConnection()
        {
            string key = "maindb";
            var xmlStr = File.ReadAllText(@"C:\Program Files\Siemens\SimaticIT\Unified\bin\Worker.exe.config");
            var str = XElement.Parse(xmlStr);
            var connStrings = str.Elements("connectionStrings");
            if (connStrings.Count() == 0)
            {
                throw new Exception($"未配置数据库链接字符串");
            }
            var db = connStrings.Elements().Where(t => t.Attribute("name").Value == key).FirstOrDefault();
            if (db == null)
            {
                throw new Exception($"未找到数据库链接字符串");
            }
            var url = db.Attribute("connectionString");
            if (url == null)
            {
                throw new Exception($"未找到数据库链接字符串");
            }
            var urlStr = url.Value;
            if (string.IsNullOrWhiteSpace(urlStr))
            {
                throw new Exception($"未找到数据库链接字符串");
            }
            取接口地址
            //var api = platform.Query<IApiEntity>().FirstOrDefault(t => t.Key == key);
            //if (api == null || string.IsNullOrEmpty(api.ApiUrl))
            //{
            //    throw new Exception($"地址{key}不存在");
            //}
            var connection = new SqlConnection(urlStr);
            if (connection.State == ConnectionState.Closed)
            {
                connection.Open();
            }
            return connection;
        }

        #endregion

        #region Method

        #region 按数据集方式获得数据

        /// <summary>
        /// 获得Table数据
        /// </summary> 
        /// <param name="sql"></param>
        /// <param name="msg"></param>
        /// <returns></returns>
        public static DataTable GetData_Table(string sql, out string msg)
        {
            DateTime beforDT = DateTime.Now;
            DataTable dt = new DataTable();
            try
            {
                #region 1.数据合法性校验 
                msg = "获取数据成功";
                if (string.IsNullOrEmpty(sql))
                {
                    msg = "Sql语句为空！";
                    return dt;
                } 
                #endregion

                IDbConnection connection = ReadingFunctionGetSQLDBConnection();
                var reader = connection.ExecuteReader(sql);
                dt.Load(reader);
                //LogProxy.Info("查询开始==========================================================");
                //LogProxy.Info("查询时间：" + DateTime.Now.Subtract(beforDT).TotalMilliseconds.ToString() + " 毫秒");
                //LogProxy.Info("GetData_Table()请求SQL:" + sql);
                //LogProxy.Info("查询结束==========================================================");
                return dt;
            }
            catch (Exception ex)
            {
                msg = ex.Message;
                //LogProxy.Error("异常信息开始==========================================================");
                //LogProxy.Error("查询时间：" + DateTime.Now.Subtract(beforDT).TotalMilliseconds.ToString() + " 毫秒");
                //LogProxy.Error("GetData_Table()请求SQL:" + sql);
                //LogProxy.Error("GetData_Table()异常信息:" + ex.Message);
                //LogProxy.Error("异常信息结束==========================================================");
                return dt;
            }
        }

        /// <summary>
        /// 获得数据集合
        /// </summary>
        /// <param name="sql"></param>
        /// <param name="msg"></param>
        /// <returns></returns>
        public static DataSet GetDataSet(string sql, out string msg)
        {
            DateTime beforDT = DateTime.Now;
            try
            {
                using (IDbConnection connection = ReadingFunctionGetSQLDBConnection())
                {
                    msg = "数据获取成功!";
                    DataSet dataSet = new XDataSet();
                    IDataReader reader = connection.ExecuteReader(sql);
                    dataSet.Load(reader, LoadOption.OverwriteChanges, null, new DataTable[] { });
                    //LogProxy.Info("查询开始==========================================================");
                    //LogProxy.Info("查询时间：" + DateTime.Now.Subtract(beforDT).TotalMilliseconds.ToString() + " 毫秒");
                    //LogProxy.Info("GetDataSet()请求SQL:" + sql);
                    //LogProxy.Info("查询结束==========================================================");
                    return dataSet;
                }
            }
            catch (Exception ex)
            {
                msg = ex.Message;
                //LogProxy.Error("异常信息开始==========================================================");
                //LogProxy.Error("查询时间：" + DateTime.Now.Subtract(beforDT).TotalMilliseconds.ToString() + " 毫秒");
                //LogProxy.Error("GetDataSet()请求SQL:" + sql);
                //LogProxy.Error("GetDataSet()异常信息:" + ex.Message);
                //LogProxy.Error("异常信息结束==========================================================");
                return null;
            }
        }

        #endregion

        #region 按实体类方式获得数据

        /// <summary>
        /// 通过主键获得实体
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="id"></param>
        /// <param name="msg"></param>
        /// <returns></returns>
        public static T GetDataById<T>(string id, out string msg) where T : class
        {
            DateTime beforDT = DateTime.Now;
            try
            {
                #region 1.数据合法性校验

                msg = "获取数据成功";
                if (string.IsNullOrEmpty(id))
                {
                    msg = "主键Id为空！";
                    return default(T);
                } 
                #endregion

                #region 2.获得数据

                I