42-CATL-DianChiXian-SCADA_CATL/DT_SCADA/Core/MysqlClient.cs

using MySql.Data.MySqlClient;
using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DatabaseClient
{
   public class MysqlClient
    {
       
        public static bool ExecQuerySQL(string sql, string ConnectStr, out string err)
        {
           // lock (losk1) {
                bool success = false;
                err = "";
                using (MySqlConnection conn = new MySqlConnection(ConnectStr))
                {
                    try
                    {
                        conn.Open();

                        MySqlCommand command = new MySqlCommand(sql, conn);
                        command.ExecuteNonQuery();
                        success = true;
                    }
                    catch (Exception er)
                    {
                        err = er.Message;
                    }
                    finally
                    {
                        if (conn != null)
                        {
                            conn.Close();
                        }
                    }

                }

                return success;
           // }
            
        }



        public static bool ExecQueryDataTable(string sql, string ConnectStr,out DataTable dt, out string err)
        {
            bool success = false;
            err = "";
            dt = null;
            using (MySqlConnection conn = new MySqlConnection(ConnectStr))
            {
                try
                {
                    conn.Open();

                    MySqlCommand command = new MySqlCommand(sql, conn);
                    MySqlDataAdapter da = new MySqlDataAdapter(command);
                    DataSet ds = new DataSet();
                    da.Fill(ds);

                    if (ds.Tables.Count > 0)
                    {
                        dt = ds.Tables[0];
                    }
                    success = true;
                }
                catch (Exception er)
                {
                    err = er.Message;
                }
                finally
                {
                    if (conn != null)
                    {
                        conn.Close();
                    }
                }

            }

            return success;
        }






    }
}