[C# 문법] C# MySQL 데이터베이스 연결(연동) 방법

 

 

안녕하세요.

 

오늘은 C# 문법에서 MySQL 연동하는 방법에 대해서 알려 드리려고 합니다.

 

자세한 설명을 생략하고 다이렉트로 MySQL 연동 소스코드를 Class 로 만들어서 올려 드릴 테니까 분석을 하셔서 필요하신 정보들만 가져가서 사용하시면 될 것 같습니다.

 

당연히 MySQL 연동을 하기전에는 MySQL .dll 참조가 되어 있어야 하고, MySQL이 설치 되어 있어야 되겠죠?ㅎㅎ

 

저는 싱글톤 디자인 패턴을 사용하여 MySQL 연동 소스 코드를 작성하였고, 필요 하신 분들은 여기서 원하는 코드를 참고해 주시면 감사하겠습니다!

 

 

 

 

 

 

MySQL 연동 소스코드

 

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using System; using System.Collections.Generic; using System.Data; using System.Linq; using System.Text; using System.Threading.Tasks; using MySql.Data.MySqlClient; using System.Data.SqlClient; namespace DB {     public class Connection     {         public static string IP         {             get             {                  return "127.0.0.1";                             }         }         public static int PORT         {             get             {                 int port = 3306;                 return port;             }         }         public static string ID         {             get             {                 return "127.0.0.1";             }         }         public static string PASSWORD         {             get             {                 return "127.0.0.1";             }         }         public static string DBNAME         {             get             {                 return "127.0.0.1";             }         }         /// <summary>         /// 싱글톤 객체         /// </summary>         private static Connection Instance = null;         private static string connectString;         /// <summary>         /// 싱글톤 객체         /// </summary>         public static Connection INSTANCE         {             get             {                 if (Instance == null)                 {                     connectString = string.Format("server=; port=; uid=; pwd=; database=; Pooling=true; MIN Pool Size=5; Max Pool Size=10; Connection Timeout=60; allow user variables=true;"                                                     , IP                                                     , PORT                                                     , ID                                                     , PASSWORD                                                     , DBNAME);                     try                     {                         Instance = new Connection(connectString);                     }                     catch (Exception e)                     {                     }                 }                 return Instance;             }         }         /// <summary>         /// Mysql Connection 객체         /// </summary>         private MySqlConnection connection = null;         private static object MessageBox;         /// <summary>         /// 생성자         /// </summary>         /// <param name="connectionString">connection 스트링</param>         public Connection(string connectionString)         {             try             {                 connection = new MySqlConnection(connectionString);                 connection.Open();             }             catch (Exception e)             {             }         }         /// <summary>         /// DB연결을 종료한다.         /// </summary>         public void Close()         {             if (connection != null)             {                 try                 {                     connection.Close();                 }                 catch (Exception e)                 {                 }             }         }         /// <summary>         /// Query를 실행한다.         /// </summary>         /// <returns></returns>         public DataSet  ExecuteCommand(string query)         {             try             {                 DataSet ds = null;                 if(connection != null && connection.State == ConnectionState.Closed)                 {                     Instance = new Connection(connectString);                 }                 MySqlConnection conn = connection;                 using (MySqlCommand cmd = conn.CreateCommand())                 {                     cmd.CommandText = query;                     cmd.ExecuteNonQuery();                     using (MySqlDataAdapter da = new MySqlDataAdapter())                     {                         da.SelectCommand = cmd;                         ds = new DataSet();                         da.Fill(ds);                     }                 }                 return ds;             }             catch (Exception e1)             {                 return null;             }         }         /// <summary>         /// Insert,Delete,Update등의 Query를 실행한다.         /// </summary>         /// <returns></returns>         public void ExecuteModifyCommand(string query)         {             try             {                 MySqlConnection conn = connection;                 using (MySqlCommand cmd = conn.CreateCommand())                 {                     cmd.CommandText = query;                     cmd.ExecuteNonQuery();                 }             }             catch (Exception e1)             {                 throw e1;             }         }         /// <summary>         ///     Insert, Update, Delete Query Execute         /// </summary>         /// <param name="commandText"></param>         /// <param name="procedureType"></param>         /// <param name="paramList"></param>         public void ModifyCommand(string commandText                                   , CommandType procedureType =  CommandType.StoredProcedure                                   , List<DatabaseParameter> paramList = null                                   )         {             try             {                 MySqlCommand cmd;                 MySqlDataAdapter da = new MySqlDataAdapter();                 cmd = connection.CreateCommand();                 cmd.CommandText = commandText;                 cmd.CommandType = procedureType;                 if (paramList != null)                 {                     for (int index = 0; index < paramList.Count; index++)                     {                         cmd.Parameters.Add(paramList[index].NAME, paramList[index].VALUE);                         cmd.Parameters[paramList[index].NAME].Direction  = paramList[index].PARAMDIRECTION;                     }                 }                 cmd.ExecuteNonQuery();             }             catch (Exception e)             {                 throw e;             }         }         /// <summary>         ///     Select Query Execute         /// </summary>         /// <param name="commandText"></param>         /// <param name="procedureType"></param>         /// <param name="paramList"></param>         /// <returns></returns>         public DataSet inquiryCommand(string commandText                                      , CommandType procedureType  = CommandType.StoredProcedure                                      , List<DatabaseParameter> paramList = null                                      )         {             try             {                 MySqlCommand cmd;                 MySqlDataAdapter da = new MySqlDataAdapter();                 cmd = connection.CreateCommand();                 cmd.CommandText = commandText;                 cmd.CommandType = procedureType;                 if (paramList != null)                 {                     for (int index = 0; index < paramList.Count; index++)                     {                         cmd.Parameters.Add(paramList[index].NAME, paramList[index].VALUE);                         cmd.Parameters[paramList[index].NAME].Direction  = paramList[index].PARAMDIRECTION;                     }                 }                 cmd.ExecuteNonQuery();                 da.SelectCommand = cmd;                 DataSet ds = new DataSet();                 da.Fill(ds);                 return ds;             }             catch (Exception e)             {                 throw e;             }         }         public DataSet inquiryCommandQuery(string query)         {             try             {                 DataSet ds = new DataSet();                 MySqlDataAdapter adpt = new MySqlDataAdapter(query, connection);                 adpt.Fill(ds);                 return ds;             }             catch(Exception e)             {                 throw e;             }         }     } }   Colored by Color Scripter

cs

 

DatabaseParameter 클래스 정보는 아래와 같습니다~~

 

public class DatabaseParameter
{
    public string NAME { get; set; }
    public object VALUE { get; set; }

    public ParameterDirection PARAMDIRECTION { get; set; }

    public DatabaseParameter(string name, object value, ParameterDirection paramDirection)
    {
       NAME = name;
       VALUE = value;
       PARAMDIRECTION = paramDirection;
   }
}

 

System.Data.DataSet을

 

여기서 필요하신 부분들만 가져가서 연습해 보세요~~

 

감사합니다.^^