coursedlg.cpp

使用DAO操作数据库 要运行程序必须将数据库文件course.mdb与可执行文件放在一起

// CourseDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Course.h"
#include "CourseDlg.h"
#include "MyCourse.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// Dialog Data
	//{{AFX_DATA(CAboutDlg)
	enum { IDD = IDD_ABOUTBOX };
	//}}AFX_DATA

	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CAboutDlg)
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
	//}}AFX_VIRTUAL

// Implementation
protected:
	//{{AFX_MSG(CAboutDlg)
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
	//{{AFX_DATA_INIT(CAboutDlg)
	//}}AFX_DATA_INIT
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CAboutDlg)
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
	//{{AFX_MSG_MAP(CAboutDlg)
		// No message handlers
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CCourseDlg dialog

CCourseDlg::CCourseDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CCourseDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CCourseDlg)
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CCourseDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CCourseDlg)
	DDX_Control(pDX, IDsave, m_save);
	DDX_Control(pDX, NEXT, m_NEXT);
	DDX_Control(pDX, IDC_LAST, m_LAST);
	DDX_Control(pDX, IDC_BEFORE, m_BEFORE);
	DDX_Control(pDX, IDC_FIRST, m_FIRST);
	DDX_Control(pDX, IDdelete, m_delete);
	DDX_Control(pDX, IDedit, m_edit);
	DDX_Control(pDX, IDC_TIME, m_TIME);
	DDX_Control(pDX, IDC_TEACHER, m_TEACHER);
	DDX_Control(pDX, IDC_NAME, m_NAME);
	DDX_Control(pDX, IDC_MARK, m_MARK);
	DDX_Control(pDX, IDC_ID, m_ID);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CCourseDlg, CDialog)
	//{{AFX_MSG_MAP(CCourseDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDadd, Onadd)
	ON_BN_CLICKED(IDedit, Onedit)
	ON_BN_CLICKED(IDsave, Onsave)
	ON_BN_CLICKED(IDdelete, Ondelete)
	ON_BN_CLICKED(IDC_FIRST, OnFirst)
	ON_BN_CLICKED(IDC_BEFORE, OnBefore)
	ON_BN_CLICKED(NEXT, OnNEXT)
	ON_BN_CLICKED(IDC_LAST, OnLast)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CCourseDlg message handlers

BOOL CCourseDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	
	// TODO: Add extra initialization here
	//初始化，显示表中第一条记录
	thecourse.Open();
    displaydata();
	m_FIRST.EnableWindow(false);
	m_BEFORE.EnableWindow(FALSE);
	m_save.EnableWindow(false);
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CCourseDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CCourseDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CCourseDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CCourseDlg::Onadd() 
{
	// TODO: Add your control notification handler code here
	//首先清空
	CWnd* t;
	t=CWnd::GetDlgItem(IDC_ID);
	t->SetWindowText("");	
	t=CWnd::GetDlgItem(IDC_NAME);
	t->SetWindowText("");
	t=CWnd::GetDlgItem(IDC_TIME);
	t->SetWindowText("");
	t=CWnd::GetDlgItem(IDC_MARK);
	t->SetWindowText("");
	t=CWnd::GetDlgItem(IDC_TEACHER);
	t->SetWindowText("");
	//添加时不可编辑和删除
	m_edit.EnableWindow(false);
	m_delete.EnableWindow(false);
	//添加时各edit框可写
	setstate(false);	
	state=0;
	m_save.EnableWindow(true);
	
}

void CCourseDlg::Onedit() 
{
	// TODO: Add your control notification handler code here
	//编辑时不可删除
	m_delete.EnableWindow(false);
	//编辑时各edit框可写
	setstate(false);
	state=1;
	CWnd* t;
	CString s;	
	t=CWnd::GetDlgItem(IDC_ID);
	t->GetWindowText(s);
	old=atoi(s);
	m_save.EnableWindow(true);
	
}

void CCourseDlg::Onsave() 
{
    //信息必须填写完整
	CWnd* t;
	CString s1,s2,s3,s4,s5;
	int Is1,Is4;
	t=CWnd::GetDlgItem(IDC_ID);
	t->GetWindowText(s1);	
	t=CWnd::GetDlgItem(IDC_NAME);
	t->GetWindowText(s2);
	t=CWnd::GetDlgItem(IDC_TIME);
	t->GetWindowText(s3);
	t=CWnd::GetDlgItem(IDC_MARK);
	t->GetWindowText(s4);	
	t=CWnd::GetDlgItem(IDC_TEACHER);
	t->GetWindowText(s5);
	if ((s1=="")||(s2=="")||(s3=="")||(s4=="")||(s5=="")) 
	{
		MessageBox("请将信息填写完整！","错误提示");
		return;
	};   
	if ((s1<"0")||(s1>"9"))
	{
		MessageBox("课程编号和学分必须为数字！","错误提示");
		((CEdit*)t)->GetFocus();
		return;
	}
	else
	{
		Is1=atoi(s1);
	}
	if ((s4<"0")||(s4>"9"))
	{
		MessageBox("课程编号和学分必须为数字！","错误提示");
		((CEdit*)t)->GetFocus();
		return;
	}
	else
	{
		Is4=atoi(s4);
	}
	try
		{
			//ID号不可重复
			if (((state==1)&&!(old==Is1))||(state==0))
			{
				CDaoDatabase Db;
				CDaoRecordset Set(&Db);
				CString sql;
				sql.Format("SELECT * FROM course where CourseId=%d",Is1);				
				Db.Open("course.mdb");
				Set.Open(dbOpenDynaset,sql);					
				long count;						
				count=Set.GetRecordCount();		
				if (count>0)
				{
					MessageBox("此ID号已存在，请重试！","信息提示");
					return;
				}
			}			
			//在库中添加一条空的记录
			if (state==0) 
				thecourse.AddNew();		
			//使当前记录处于编辑状态
			else 
			thecourse.Edit();	
			//将控件中所输入内容赋给变量
			thecourse.m_CourseId=Is1;
			thecourse.m_CourseName=s2;
			thecourse.m_CourseTime=s3;
			thecourse.m_Mark=Is4;
			thecourse.m_Teacher=s5;
			//更新数据库	
			thecourse.Update();	
			//重新获得数据
			thecourse.Requery();						
		}
	catch (CDaoException* e)
		{
			e->ReportError();
			return;
		}
	MessageBox("保存成功！","信息提示");
	//保存后使编辑和删除按钮可用
	m_edit.EnableWindow();
	m_delete.EnableWindow();
	//保存后使各edit框只读
	setstate(true);
	m_save.EnableWindow(false);
		
	
}

void CCourseDlg::Ondelete() 
{
   	if (MessageBox("确定要删除吗？","提示",MB_YESNO)==IDYES)
	{
	//删除
    thecourse.Delete();
	//重新获得记录集
    thecourse.Requery();
	MessageBox("删除成功！","提示信息");
	displaydata();
	}
}



void CCourseDlg::OnFirst() 
{

	thecourse.MoveFirst();
	m_FIRST.EnableWindow(false);
	m_BEFORE.EnableWindow(FALSE);
	m_NEXT.EnableWindow(true);
	m_LAST.EnableWindow(true);
	displaydata();
	

}

void CCourseDlg::OnBefore() 
{
	
	thecourse.MovePrev();
	m_NEXT.EnableWindow(true);
	m_LAST.EnableWindow(true);	
	displaydata();
	thecourse.MovePrev();
	if (thecourse.IsBOF())
	{
		m_FIRST.EnableWindow(false);
		m_BEFORE.EnableWindow(FALSE);
	}
	thecourse.MoveNext();
	

}

void CCourseDlg::OnNEXT() 
{
	thecourse.MoveNext();
	m_FIRST.EnableWindow(true);
	m_BEFORE.EnableWindow(true);	
	displaydata();
	thecourse.MoveNext();
	if (thecourse.IsEOF())
	{
		m_NEXT.EnableWindow(FALSE);
		m_LAST.EnableWindow(FALSE);
	}
	thecourse.MovePrev();
	
}

void CCourseDlg::OnLast() 
{


	thecourse.MoveLast();
	m_FIRST.EnableWindow(true);
	m_BEFORE.EnableWindow(true);
	m_NEXT.EnableWindow(FALSE);
	m_LAST.EnableWindow(FALSE);
	displaydata();
	
}

void CCourseDlg::displaydata()
{
	char s[10];
    itoa(thecourse.m_CourseId,s,10);
    m_ID.SetWindowText(s);	
    m_NAME.SetWindowText(thecourse.m_CourseName);	
    m_TIME.SetWindowText(thecourse.m_CourseTime);
	itoa(thecourse.m_Mark,s,10);
    m_MARK.SetWindowText(s);	
    m_TEACHER.SetWindowText(thecourse.m_Teacher);
}

void CCourseDlg::setstate(bool breadstate)
{
	((CEdit*)GetDlgItem(IDC_ID))->SetReadOnly(breadstate);
	((CEdit*)GetDlgItem(IDC_NAME))->SetReadOnly(breadstate);
	((CEdit*)GetDlgItem(IDC_TIME))->SetReadOnly(breadstate);
	((CEdit*)GetDlgItem(IDC_MARK))->SetReadOnly(breadstate);
	((CEdit*)GetDlgItem(IDC_TEACHER))->SetReadOnly(breadstate);
}