HuNan_NOSqlSugar/DM_Weight/Services/SqlHelper.cs

using log4net;
using MySqlConnector;
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DM_Weight.Services
{
    public class SqlHelper<T> where T :new()
    {
        //private readonly ILog logger = LogManager.GetLogger(typeof(SqlHelperService));
        //public static string connStr = ConfigurationManager.ConnectionStrings["database"].ToString();
        ////public bool IsConnected()
        ////{
        ////    bool ret=false;
        ////    using (MySqlConnection conn = new MySqlConnection(connStr))
        ////    {
        ////        try
        ////        {
        ////            conn.Open();

        ////            ret= true;
        ////        }
        ////        catch (Exception ex)
        ////        {
        ////            //throw ex;
        ////            ret= false;
        ////        }
        ////        logger.Info($"数据库连接状态{conn.State}");
        ////    }
        ////    return ret;
        ////}
        //public T ExecuteQuery(string sql, params MySqlParameter[] param)
        //{
        //    T t=new T();
        //    DataSet ds = new DataSet();
        //    using (MySqlConnection conn = new MySqlConnection(ConfigurationManager.ConnectionStrings["dbConnect"].ConnectionString))
        //    {
        //        try
        //        {
        //            conn.Open();

        //            using (MySqlCommand cmd = new MySqlCommand(sql, conn))
        //            {
        //                if (param != null)
        //                    cmd.Parameters.AddRange(param);
        //                MySqlDataAdapter da = new MySqlDataAdapter(cmd);
        //                da.Fill(ds);
        //                if (param != null)
        //                    cmd.Parameters.Clear();
                        
        //            }
        //        }
        //        catch (Exception ex)
        //        {
        //            throw ex;
        //        }
        //    }
        //    return t;
        //}

        ///// <summary>
        ///// 执行增、删、改的方法
        ///// </summary>
        ///// <param name="sql">预计执行的非SELECT查询语句</param>
        ///// <param name="param">SQL语句中的可变参数</param>
        ///// <returns>返回受影响的行数</returns>
        //public int ExecuteNonQuery(string sql, params MySqlParameter[] param)
        //{
        //    using (MySqlConnection conn = new MySqlConnection(ConfigurationManager.ConnectionStrings["dbConnect"].ConnectionString))
        //    {
        //        try
        //        {
        //            conn.Open();
        //            MySqlCommand cmd = new MySqlCommand(sql, conn);
        //            if (param != null)
        //                cmd.Parameters.AddRange(param);
        //            int affectCount = cmd.ExecuteNonQuery();
        //            if (param != null)
        //                cmd.Parameters.Clear();//添加这一句即可解决此问题
        //            return affectCount;
        //        }
        //        catch (Exception ex)
        //        {
        //            throw ex;
        //        }
        //    }
        //}

        //public long ExecuteNonQueryAndGetLastInsertedId(string sql, params MySqlParameter[] param)
        //{
        //    using (MySqlConnection conn = new MySqlConnection(ConfigurationManager.ConnectionStrings["dbConnect"].ConnectionString))
        //    {
        //        try
        //        {
        //            conn.Open();
        //            MySqlCommand cmd = new MySqlCommand(sql, conn);
        //            if (param != null)
        //                cmd.Parameters.AddRange(param);
        //            int affectCount = cmd.ExecuteNonQuery();
        //            if (param != null)
        //                cmd.Parameters.Clear();
        //            return cmd.LastInsertedId;
        //        }
        //        catch (Exception ex)
        //        {
        //            throw ex;
        //        }
        //    }
        //}


        //public static bool ExecuteNonQueryList(List<string> sqlList, List<MySqlParameter[]> paramList)
        //{
        //    using (MySqlConnection conn = new MySqlConnection(ConfigurationManager.ConnectionStrings["dbConnect"].ConnectionString))
        //    {
        //        try
        //        {
        //            conn.Open();
        //            MySqlTransaction transaction = conn.BeginTransaction();
        //            MySqlCommand cmd = conn.CreateCommand();
        //            cmd.Transaction = transaction;

        //            try
        //            {
        //                for (int i = 0; i < sqlList.Count; i++)
        //                {
        //                    cmd.CommandText = sqlList[i];
        //                    cmd.Parameters.AddRange(paramList[i]);
        //                    cmd.ExecuteNonQuery();
        //                    cmd.Parameters.Clear();//添加这一句即可解决此问题
        //                }
        //                transaction.Commit();
        //                return true;
        //            }
        //            catch (Exception ex)
        //            {
        //                //logs.Log.WriteLine("错误原因:" + ex.Message);
        //                try
        //                {
        //                    //logs.Log.WriteLine("事物回滚");
        //                    transaction.Rollback();//出现错误就回滚...
        //                }
        //                catch (Exception ex1)
        //                {
        //                    throw ex1;
        //                }
        //                throw ex;
        //            }
        //        }
        //        catch (Exception ex)
        //        {
        //            throw ex;
        //        }
        //    }
        //}
    }
}