簡單實用的數據讀取，數據操作方法，貼到程序里面直接調用

讀取方法：

public DataSet Query(string SQLText)
  {
   SqlConnection myConnection=new SqlConnection(ConfigurationSettings.AppSettings["conn"]);
   DataSet ds = new DataSet();
   SqlDataAdapter myCommand = new SqlDataAdapter(SQLText,myConnection);
   myCommand.Fill(ds);
   return ds;
  }

操作方法：

//執行查詢,返回SqlDataReader
  public  SqlDataReader QueryByReader(string sqlstr)
  {
   if (sqlstr==String.Empty)
    return null;
  
   SqlConnection myConnection = new SqlConnection(ConfigurationSettings.AppSettings["connstring"]);
   SqlCommand myCommand = new SqlCommand(sqlstr, myConnection);

   myConnection.Open();
   SqlDataReader result = myCommand.ExecuteReader(CommandBehavior.CloseConnection);
  
   return result;
  }

  //操作數據庫,不返回結果
  public  bool OperateDB(string sqlstr)
  {
   if (sqlstr==String.Empty)
    return false;

   SqlConnection myConnection = new SqlConnection(ConfigurationSettings.AppSettings["connstring"]);
   SqlCommand myCommand = new SqlCommand(sqlstr, myConnection);

   myConnection.Open();
   myCommand.ExecuteNonQuery();
   myConnection.Close();

   return true;
  }