ADO.NET 1.1 搭配 Factory Pattern

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//使用的方式： string myExecuteQuery = @"                                         SELECT        *                                         FROM           employee                                         WHERE          email = @email                                  "; SqlParameter[] myParamArray = new SqlParameter[] {            new SqlParameter("@email", SqlDbType.NVarChar, 20) }; myParamArray[0].Value = email; DataSet ds = ReadDataHelper.ExecuteDataSet(m_SqlConnObjFactory.GetFactory(ConnType.conn1).Conn("employee"), myExecuteQuery, myParamArray); using System; using System.Data; using System.Data.SqlClient; namespace CommonDAL {     //interface     public interface IConnObjFactory     {         IConnObj GetFactory(int t);     }     public interface IConnObj     {         IDbConnection Conn(string dbName);     }     //=========================================          public class SqlConnObjFactory : IConnObjFactory     {         public SqlConnObjFactory() {}         // 取得IConnObj         public IConnObj GetFactory(ConnType connType)         {             return GetFactory((int)connType);         }         public IConnObj GetFactory(int t)         {             switch (t)             {                 case 1:                     return new conn1();                 case 2:                      return new conn2();                 case 3:                     return new conn3();                 default:                         throw new Exception("Unknown ConnObj Type!");             }         }     }     public enum ConnType     {         conn1=1,         conn2=2,         conn3=3     }          public class conn1 : IConnObj     {         public conn1(){ }         public IDbConnection Conn(string dbName)         {             // returnIDbConnection         }     }          public class ReadDataHelper     {         public ReadDataHelper() {}         //執行SQL，回傳字串         public static string ExecuteScalarStrData(IDbConnection myConnection, string myScalarQuery, SqlParameter[] myParamArray)         {             string Result = "";             try             {                 if (myConnection.State == ConnectionState.Closed)                     myConnection.Open();                 SqlCommand myCmd = new SqlCommand(myScalarQuery, (SqlConnection)myConnection);                 myCmd.CommandText = myScalarQuery;                                  if (myParamArray != null)                 {                     foreach (SqlParameter para in myParamArray)                         myCmd.Parameters.Add(para);                 }                 Result = (string)myCmd.ExecuteScalar();             }             catch (Exception e)             {                 sendErrorSqlMessage(myScalarQuery + "<br>" + e.Message + "<br>" + e.StackTrace);             }             finally             {                 myConnection.Close();             }             return Result;         }                  //執行SQL，回傳字串（使用交易）         public static string ExecuteScalarStrData(Trans t, string myScalarQuery, SqlParameter[] myParamArray)         {             string Result = "";             try             {                 SqlCommand myCmd = new SqlCommand(myScalarQuery, (SqlConnection)t.DbConnection, (SqlTransaction)t.DbTrans);                 myCmd.CommandText = myScalarQuery;                 if (myParamArray != null)                 {                     foreach (SqlParameter para in myParamArray)                         myCmd.Parameters.Add(para);                 }                 Result = (string)myCmd.ExecuteScalar();             }             catch (Exception e)             {                 sendErrorSqlMessage(myScalarQuery + "<br>" + e.Message + "<br>" + e.StackTrace);                 throw e;             }             return Result;         }         //執行SQL，回傳數字         public static int ExecuteScalarIntData(IDbConnection myConnection, string myScalarQuery, SqlParameter[] myParamArray)         {             int Result = 0;             try             {                 if (myConnection.State == ConnectionState.Closed)                     myConnection.Open();                 SqlCommand myCmd = new SqlCommand(myScalarQuery, (SqlConnection)myConnection);                 myCmd.CommandText = myScalarQuery;                 if (myParamArray != null)                 {                     foreach (SqlParameter para in myParamArray)                         myCmd.Parameters.Add(para);                 }                 Result = (int)myCmd.ExecuteScalar();             }             catch (Exception e)             {                 sendErrorSqlMessage(myScalarQuery + "<br>" + e.Message + "<br>" + e.StackTrace);             }             finally             {                 myConnection.Close();             }             return Result;         }         //執行SQL，回傳數字（使用交易）         public static int ExecuteScalarIntData(Trans t, string myScalarQuery, SqlParameter[] myParamArray)         {             int Result = 0;             try             {                 SqlCommand myCmd = new SqlCommand(myScalarQuery, (SqlConnection)t.DbConnection, (SqlTransaction)t.DbTrans);                 myCmd.CommandText = myScalarQuery;                 if (myParamArray != null)                 {                     foreach (SqlParameter para in myParamArray)                         myCmd.Parameters.Add(para);                 }                 Result = (int)myCmd.ExecuteScalar();             }             catch (Exception e)             {                 sendErrorSqlMessage(myScalarQuery + "<br>" + e.Message + "<br>" + e.StackTrace);                 throw e;             }             return Result;         }         //執行SQL，回傳受影響的資料列         public static int ExecuteNonQueryEffectRowsCount(IDbConnection myConnection, string myExecuteQuery, SqlParameter[] myParamArray)         {             int count = 0;             try             {                 SqlCommand myCmd = new SqlCommand(myExecuteQuery, (SqlConnection)myConnection);                 myCmd.CommandText = myExecuteQuery;                 if (myParamArray != null)                 {                     foreach (SqlParameter para in myParamArray)                         myCmd.Parameters.Add(para);                 }                 count = myCmd.ExecuteNonQuery();             }             catch (Exception e)             {                 sendErrorSqlMessage(myExecuteQuery + "<br>" + e.Message + "<br>" + e.StackTrace);             }             finally             {                 myConnection.Close();             }             return count;         }                  //執行SQL，回傳受影響的資料列（使用交易）         public static int ExecuteNonQueryEffectRowsCount(Trans t, string myExecuteQuery, SqlParameter[] myParamArray)         {             int count = 0;             try             {                 SqlCommand myCmd = new SqlCommand(myExecuteQuery, (SqlConnection)t.DbConnection, (SqlTransaction)t.DbTrans);                 myCmd.CommandText = myExecuteQuery;                 if (myParamArray != null)                 {                     foreach (SqlParameter para in myParamArray)                         myCmd.Parameters.Add(para);                 }                 count = myCmd.ExecuteNonQuery();             }             catch (Exception e)             {                 sendErrorSqlMessage(myExecuteQuery + "<br>" + e.Message + "<br>" + e.StackTrace);                 throw e;             }             return count;         }         // 用DataAdapter以DataSet型式回傳所有資料         public static DataSet ExecuteDataSet(IDbConnection myConnection, string myExecuteQuery, SqlParameter[] myParamArray)         {             DataSet resultDS = new DataSet();             try             {                 SqlCommand myCmd = new SqlCommand(myExecuteQuery, (SqlConnection)myConnection);                 myCmd.CommandText = myExecuteQuery;                 if (myParamArray != null)                 {                     foreach (SqlParameter para in myParamArray)                         myCmd.Parameters.Add(para);                 }                 SqlDataAdapter myDataAdapter = new SqlDataAdapter(myCmd);                 myDataAdapter.Fill(resultDS);             }             catch (Exception e)             {                 sendErrorSqlMessage(myExecuteQuery + "<br>" + e.Message + "<br>" + e.StackTrace);             }             finally             {                 myConnection.Close();             }             return resultDS;         }         // 對多個sqlcommand做transaction         public static bool ExcuteSQLwithTran(IDbConnection myConnection, SQLData[] mySQLDatas)         {             int count = 1;             string tmpCommandText = "";             SqlTransaction myDBTrans = ((SqlConnection)myConnection).BeginTransaction(IsolationLevel.ReadUncommitted);             try             {                 for (int x = 0; x < mySQLDatas.Length; x++)                 {                     if (count > 0 && mySQLDatas[x].SQLCommand != "")                     {                         SqlCommand myCmd = new SqlCommand(mySQLDatas[x].SQLCommand, myDBTrans.Connection);                         myCmd.CommandText = mySQLDatas[x].SQLCommand;                         myCmd.Transaction = myDBTrans;                         tmpCommandText = mySQLDatas[x].SQLCommand;                         if (mySQLDatas[x].SQLParameter != null)                         {                             foreach (SqlParameter para in mySQLDatas[x].SQLParameter)                                 myCmd.Parameters.Add(para);                         }                         count = myCmd.ExecuteNonQuery();                     }                 }                 if (count > 0)                     myDBTrans.Commit();                 else                     myDBTrans.Rollback();             }             catch (Exception e)             {                 myDBTrans.Rollback();                 sendErrorSqlMessage(tmpCommandText + "<br>" + e.Message + "<br>" + e.StackTrace);                 //throw e;                 return false;             }             finally             {                 myConnection.Close();             }             //return (count>0?true:false);             return true;         }         // 更新DataTable         public static bool UpdateDataTable(IDbConnection myConnection, string myExecuteQuery, SqlParameter[] myParamArray, DataTable table)         {             try             {                 SqlCommand myCmd = new SqlCommand(myExecuteQuery, (SqlConnection)myConnection);                 myCmd.CommandText = myExecuteQuery;                 if (myParamArray != null)                 {                     foreach (SqlParameter para in myParamArray)                        myCmd.Parameters.Add(para);                 }                 SqlDataAdapter myDataAdapter = new SqlDataAdapter();                 myDataAdapter.SelectCommand = myCmd;                 SqlCommandBuilder custCB = new SqlCommandBuilder(myDataAdapter);                 custCB.QuotePrefix = "[";                 custCB.QuoteSuffix = "]";                 myDataAdapter.Update(table);             }             catch (Exception e)             {                 sendErrorSqlMessage(myExecuteQuery + "<br>" + e.Message + "<br>" + e.StackTrace);                 return false;             }             finally             {                 myConnection.Close();             }             return true;         }         // 更新DataTable（使用交易）         public static void UpdateDataTable(Trans t, string myExecuteQuery, SqlParameter[] myParamArray, DataTable table)         {             try             {                 SqlCommand myCmd = new SqlCommand(myExecuteQuery, (SqlConnection)t.DbConnection, (SqlTransaction)t.DbTrans);                 myCmd.CommandText = myExecuteQuery;                 foreach (SqlParameter para in myParamArray)                     myCmd.Parameters.Add(para);                 SqlDataAdapter myDataAdapter = new SqlDataAdapter();                 myDataAdapter.SelectCommand = myCmd;                 SqlCommandBuilder custCB = new SqlCommandBuilder(myDataAdapter);                 custCB.QuotePrefix = "[";                 custCB.QuoteSuffix = "]";                 myDataAdapter.Update(table);             }             catch (Exception e)             {                 sendErrorSqlMessage(myExecuteQuery + "<br>" + e.Message + "<br>" + e.StackTrace);                 throw e;             }         }         public static void sendErrorSqlMessage(string message)         {             SendMailHelper.sendMail("xxx@xxx.com", "", "【xx system】- SQL Error", message);         }     }          // SQLData 可記錄每一筆sQL的語法和SQLParameter     public class SQLData     {         //sQL語法         private string m_SQLCommand;         public string SQLCommand { get {return m_SQLCommand; } set {m_SQLCommand = value; }}         //SQLParameter         private ArrayList m_SQLParameter;         public ArrayList SQLParameter { get {return m_SQLParameter; } set {m_SQLParameter = value; }}         public SQLData(string SQLCommand, ArrayList SQLParameter)         {             m_SQLCommand = SQLCommand;             m_SQLParameter = SQLParameter;         }         public SQLData() {}     }          public class Trans : IDisposable     {         private IDbConnection conn;         private IDbTransaction dbTrans;         public IDbConnection DbConnection         {             get { return this.conn; }         }         public IDbTransaction DbTrans         {             get { return this.dbTrans; }         }         public Trans(IDbConnection myConnection)         {             conn = myConnection;             if (conn.State == System.Data.ConnectionState.Closed)                 conn.Open();             dbTrans = conn.BeginTransaction();         }         public void Commit()         {             dbTrans.Commit();             this.Colse();         }         public void RollBack()         {             dbTrans.Rollback();             this.Colse();         }         public void Dispose()         {             this.Colse();         }         public void Colse()         {             if (conn.State == System.Data.ConnectionState.Open)             {                 conn.Close();             }         }     } }