Visual C++ MFC MFC 응용프로그램이름 : CreateDB. 응용프로그램종류 : 대화상자기반 SDL(Security Development Lifecycle) 검사리소스언어 : 영어 ( 미국 )

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Aldous Smith
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1 daodb.create(strdbname) ;; 새로운 DB 생성 daodb.open(strdbname) ;; 기존의 DB 연결 daodb.execute(strsql) ;; 결과가없는연산자 (Ins/Del/Upd) daodb.close() ;; DB 연결끊음 CDaoRecordset daoqryset(&daodb) ;; DB에질의결과를저장 daoqryset.open(ntype, strsql) ;; 결과가있는연산자 ( 검색 ) daoqryset.movefirst,...prev,...next,...last ;; tuple 선택 daoqryset.getfieldvalue(nndx, varvalue) ;; 선택된 tuple의값 daoqryset.close() ;; 질의마감 Visual C++ MFC MFC 응용프로그램이름 : CreateDB 응용프로그램종류 : 대화상자기반 SDL(Security Development Lifecycle) 검사리소스언어 : 영어 ( 미국 ) About Box 대화상자제목 : Create Company Database Dialog-based Application Dialog는다음과같은 3 개의 Control로구성된다. Resource View CreateDB CreateDB.rc Dialog IDD_CREATEDB_DIALOG Comtrol ID 레이블 Hotkey Callback 함수 ⑴ Button, IDC_BTN_CREATE, &Create Database, OnBtnCreateDB ⑵ Button, IDOK, &Quit

2 ⑶ Edit, IDC_EDT_MSG, MultiLine, ReadOnly, m_strmsg V(H) Scroll, Auto V(H)Scroll Check Mnemonic ;; 단축키의중복체크 Tab Order ;; Control( 버튼 ) 들의순서를지정 Tap Stop ;; Tab으로 Control들사이를이동 Group ;; Control들의그룹 [CreateDB.rc] IDD_CREATEDB_DIALOG DIALOGEX 0, 0, 147, 178 STYLE DS_SETFONT DS_FIXEDSYS WS_POPUP WS_VISIBLE WS_CAPTION WS_SYSMENU WS_THICKFRAME EXSTYLE WS_EX_APPWINDOW CAPTION "Create Company Database" FONT 8, "MS Shell Dlg", 0, 0, 0x1 BEGIN PUSHBUTTON "&Create Database",IDC_BTN_CREATE,7,7,67,23,WS_GROUP DEFPUSHBUTTON "&Quit",IDOK,74,7,67,23 EDITTEXT IDC_EDT_MSG,7,36,133,135,ES_MULTILINE ES_AUTOVSCROLL ES_AUTOHSCROLL ES_READONLY WS_VSCROLL WS_HSCROLL WS_GROUP NOT WS_TABSTOP END [Resource.h] #define IDD_CREATEDB_DIALOG 102 #define IDR_MAINFRAME 128 #define IDC_BTN_CREATE 1000 #define IDC_EDT_MSG 1001 Resource View CreateDB CreateDB.rc Dialog IDD_CREATEDB_DIALOG IDD_CREATEDB_DIALOG Class Wizard... Callback 함수 OnBtnCreateDB 멤버변수 m_strmsg DECLARE_MESSAGE_MAP() public: afx_msg void OnBtnCreateDB(); CString m_strmsg; ; BEGIN_MESSAGE_MAP(CCreateDBDlg, CDialogEx) ON_WM_PAINT() ON_WM_QUERYDRAGICON() ON_BN_CLICKED(IDC_BTN_CREATE, &CCreateDBDlg::OnBtnCreateDB) END_MESSAGE_MAP() // TODO: 여기에컨트롤알림처리기코드를추가합니다. 1 단계저장압축파일 (1. Project.zip) #include <afxdao.h> #pragma once #pragma warning(disable: 4995)

3 // CCreateDBDlg dialog class CCreateDBDlg : public CDialogEx // Construction public: CCreateDBDlg(CWnd* pparent = NULL); // standard constructor // Dialog Data // Dialog Data #ifdef AFX_DESIGN_TIME enum IDD = IDD_CREATEDB_DIALOG ; #endif CDaoDatabase *m_pdb; CString m_strerrmsg; void CheckDatabase(CString strdb); void CreateDatabase(CString strdb); void ErrorMessage(CDaoException *e); CString ReadWholeFile(CString filename); protected: virtual void DoDataExchange(CDataExchange* pdx); // DDX/DDV support // Implementation protected: HICON m_hicon; CCreateDBDlg::CCreateDBDlg(CWnd* pparent /*=NULL*/) : CDialogEx(CCreateDBDlg::IDD, pparent), m_strmsg(_t("")) static CDaoDatabase adb; m_pdb = &adb; m_hicon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); CString strdb = _T("Company.accdb"); CheckDatabase(strDB); m_strmsg = " 새로운데이터베이스를생성합니다.\15\12"; try CreateDatabase(strDB); // CreateSchema(); // LoadDatabase(); // AlterSchema(); m_pdb->close(); catch (CDaoException* e) void CCreateDBDlg::CheckDatabase(CString strdb) WIN32_FIND_DATA afiledata; HANDLE hfile = FindFirstFile(strDB, &afiledata); if (hfile!= INVALID_HANDLE_VALUE) FindClose(hFile); if (AfxMessageBox(_T(" 이미존재합니다 \15\12 새로만들까요?"), MB_YESNO MB_ICONQUESTION) == IDNO) return; if (DeleteFile(strDB) == 0) AfxMessageBox(_T(" 기존의데이타베이스를삭제할수없습니다."), MB_OK MB_ICONINFORMATION); void CCreateDBDlg::CreateDatabase(CString strdb) m_strerrmsg = " 데이터베이스를생성할수없습니다 "; m_pdb->create(strdb); // Create Access 파일

4 m_strmsg += " 데이터베이스생성 --- OK\15\12"; UpdateData(false); void CCreateDBDlg::ErrorMessage(CDaoException *e) CString strerrmsg = m_strerrmsg + _T(".\15\12") + e->m_perrorinfo->m_strdescription; AfxMessageBox(strErrMsg, MB_OK MB_ICONINFORMATION); CString CCreateDBDlg::ReadWholeFile(CString filename) CString strtext; CStdioFile afile; if (afile.open(filename, CFile::modeRead CFile::typeText)) int nctr = (int)afile.getlength(); char *strbuffer = new char[nctr]; nctr = afile.read(strbuffer, nctr); afile.close(); strbuffer[nctr] = NULL; strtext = CString(strBuffer); strtext.trimright(); strtext += '\n'; delete strbuffer; return strtext; 2 단계저장압축파일 (2. CreateDB.zip) // Implementation void CheckDatabase(CString strdb); void CreateDatabase(CString strdb); void ExecuteSQL(CString strsql); void CreateSchema(void); void ErrorMessage(CDaoException *e); CString ReadWholeFile(CString filename); void CCreateDBDlg::ExecuteSQL(CString strsql) try m_pdb->execute(strsql); catch (CDaoException* e) void CCreateDBDlg::CreateSchema() char *strddl[] = "CREATE TABLE Department (" " DName CHAR(25) NOT NULL," " DNumber INTEGER NOT NULL," " MgrSSN CHAR(9) NOT NULL," " MgrStartDate CHAR(10)," " CONSTRAINT DeptPK PRIMARY KEY (DNumber)," " CONSTRAINT DeptUK UNIQUE (DName)" // ", CONSTRAINT DeptMgrssnFK FOREIGN KEY (MgrSSN) REFERENCES Employee(SSN)" "CREATE TABLE Employee (" " FName CHAR(15) NOT NULL," " MInit CHAR," " LName CHAR(15) NOT NULL,"

5 " SSN CHAR(9) NOT NULL," " BDate CHAR(10)," " Address CHAR(50)," " Sex CHAR," " Salary INTEGER," " SuperSSN CHAR(9)," " DNo INTEGER NOT NULL," " CONSTRAINT EmpPK PRIMARY KEY (SSN)," " CONSTRAINT EmpDnoFK FOREIGN KEY (DNo) REFERENCES Department(DNumber)" // ", CONSTRAINT EmpSuperssnFK FOREIGN KEY (SuperSSN) REFERENCES Employee(SSN)" "CREATE TABLE DeptLocations (" " DNumber INTEGER NOT NULL," " DLocation CHAR(15) NOT NULL," " CONSTRAINT DeptlocPK PRIMARY KEY (DNumber, DLocation)," " CONSTRAINT DeptlocDnmbrFK FOREIGN KEY (DNumber) REFERENCES Department(DNumber)" "CREATE TABLE Project (" " PName CHAR(25) NOT NULL," " PNumber INTEGER NOT NULL," " PLocation CHAR(15)," " DNum INTEGER NOT NULL," " CONSTRAINT PrjPK PRIMARY KEY (PNumber)," " CONSTRAINT PrjUK UNIQUE (PName)," " CONSTRAINT PrjDnumFK FOREIGN KEY (DNum) REFERENCES Department(DNumber)" "CREATE TABLE WorksOn (" " ESSN CHAR(9) NOT NULL," " PNo INTEGER NOT NULL," " Hours INTEGER NOT NULL," " CONSTRAINT WrkPK PRIMARY KEY (ESSN, PNo)," " CONSTRAINT WrkEssnFK FOREIGN KEY (ESSN) REFERENCES Employee(SSN)," " CONSTRAINT WrkPnoFK FOREIGN KEY (PNo) REFERENCES Project(PNumber)" ; "CREATE TABLE Dependent (" " ESSN CHAR(9) NOT NULL," " DependentName CHAR(15) NOT NULL," " Sex CHAR," " BDate CHAR(10)," " Relationship CHAR(8)," " CONSTRAINT DpndtPK PRIMARY KEY (ESSN, DependentName)," " CONSTRAINT DpndtEssnFK FOREIGN KEY (ESSN) REFERENCES Employee(SSN)" ");" // create tables m_strerrmsg = " 스키마를생성할수없습니다 "; for (int i = 0; i < sizeof(strddl) / sizeof(strddl[0]); i++) ExecuteSQL(CString(strDDL[i])); m_strmsg += " 스키마생성 --- OK\15\12"; UpdateData(false); // TODO: Add your control notification handler code here CString strdb = "Company.accdb"; CheckDatabase(strDB); m_strmsg = " 새로운데이터베이스를생성합니다.\15\12"; try CreateDatabase(strDB); CreateSchema(); // LoadDatabase(); // AlterSchema(); m_pdb->close(); catch (CDaoException* e)

6 3 단계저장압축파일 (3. CreateSchema.zip) // Implementation void CheckDatabase(CString strdb); void CreateDatabase(CString strdb); void ExecuteSQL(CString strsql); void CreateSchema(void); void LoadDatabase(void); void LoadTuples(CString strtable); void ErrorMessage(CDaoException *e); CString ReadWholeFile(CString filename); void CCreateDBDlg::LoadDatabase() char *strtables[] = "Department", "Employee", "DeptLocations", "Project", "WorksOn", "Dependent" ; m_strmsg += "\15\12 데이터베이스를로드합니다.\15\12"; for (int i = 0; i < sizeof(strtables) / sizeof(strtables[0]); i++) LoadTuples(CString(strTables[i])); void CCreateDBDlg::LoadTuples(CString strtable) CString strfile = _T("data") + strtable + _T(".txt"); CString strdata = ReadWholeFile(strFile); int nndx; m_strerrmsg = strtable + _T(" 튜플을삽입할수없습니다 "); while ((nndx = strdata.find('\n') + 1) > 0) CString strtuple = strdata.left(nndx); strdata = strdata.mid(nndx); strtuple.trimright(); CString strsql; strsql.format(_t("insert INTO %s VALUES (%s)"), strtable, strtuple); ExecuteSQL(strSQL); m_strmsg += strtable + _T(" 로딩 --- OK\15\12"); UpdateData(false); // TODO: Add your control notification handler code here CString strdb = "Company.accdb"; CheckDatabase(strDB); m_strmsg = " 새로운데이터베이스를생성합니다.\15\12"; try CreateDatabase(strDB); CreateSchema(); LoadDatabase(); // AlterSchema(); m_pdb->close(); catch (CDaoException* e) datatablename.txt 파일을복사한다. 4 단계저장압축파일 (4. LoadData.zip)

7 // Implementation void CheckDatabase(CString strdb); void CreateDatabase(CString strdb); void ExecuteSQL(CString strsql); void CreateSchema(void); void LoadDatabase(void); void LoadTuples(CString strtable); void AlterSchema(void); void ErrorMessage(CDaoException *e); CString ReadWholeFile(CString filename); void CCreateDBDlg::AlterSchema() char *stralterddl[] = "ALTER TABLE Employee " " ADD CONSTRAINT EmpSuperssnFK FOREIGN KEY (SuperSSN) REFERENCES Employee(SSN);", ; "ALTER TABLE Department " " ADD CONSTRAINT DeptMgrssnFK FOREIGN KEY (MgrSSN) REFERENCES Employee(SSN);" m_strmsg += "\15\12 스키마를변경합니다.\15\12"; m_strerrmsg = "Schema 를변경할수없습니다 "; for (int i = 0; i < sizeof(stralterddl) / sizeof(stralterddl[0]); i++) ExecuteSQL(CString(strAlterDDL[i])); m_strmsg += " 스키마변경 --- OK\15\12"; UpdateData(false); // TODO: Add your control notification handler code here CString strdb = "Company.accdb"; CheckDatabase(strDB); m_strmsg = " 새로운데이터베이스를생성합니다.\15\12"; try CreateDatabase(strDB); CreateSchema(); LoadDatabase(); AlterSchema(); m_pdb->close(); catch (CDaoException* e) 5 단계저장압축파일 (5. AlterSchema.zip)

8 CDaoRecordset Window Control CDialog class CDaoRecordset database Windows Dialog의 Control( 주로 Edit) adlg.updatedata(true) adlg.updatedata(false) CDialog-derived class(cdeptdlg) 멤버변수 (adlg.m_strdname) daoset.addnew(), daoset.delete() avar = daoset.getfieldvalue(ndx) daoset.edit() m_strval = V_BSTR(&aVar) daoset.setfieldvalue(ndx, strval) // V_I1, V_I2, V_I4, V_R4, V_R8,... CDaoRecordset-derived class(cdeptset) 멤버변수 (daoset.m_dname) DoFieldExchange(CDaoFieldExchange *pfx) daoset.update() daoset.open(ntype, strsql) Database (Disk의파일 ) 생성 : daodb.create( 파일명 ) 연결 : daodb.open(strdsn) daodb.open( 파일명 ) 변경 : daodb.execute(strsql) 검색 : daoset.open(ntype, strsql) 끊기 : daodb.close() // Insert/Delete/Update // MoveFirst, Last, Prev, Next

COSC344 Database Theory and Applications. σ a= c (P) S. Lecture 4 Relational algebra. π A, P X Q. COSC344 Lecture 4 1

COSC344 Database Theory and Applications σ a= c (P) S π A, C (H) P P X Q Lecture 4 Relational algebra COSC344 Lecture 4 1 Overview Last Lecture Relational Model This Lecture ER to Relational mapping Relational