adodlg.cpp

MFC程序开发参考大全 【明日科技】宋坤 刘锐宁 李伟明 【丛 书 名】 软件工程师典藏 【出 版 社】 人民邮电出版社 本书详细介绍了MFC框架中所有常用类及控件的应用

// ADODlg.cpp : implementation file
//

#include "stdafx.h"
#include "ADO.h"
#include "ADODlg.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()

/////////////////////////////////////////////////////////////////////////////
// CADODlg dialog

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

void CADODlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CADODlg)
	DDX_Control(pDX, IDC_LIST1, m_Grid);
	DDX_Text(pDX, IDC_EDIT1, m_ID);
	DDX_Text(pDX, IDC_EDIT2, m_Name);
	DDX_Text(pDX, IDC_EDIT3, m_Sex);
	DDX_Text(pDX, IDC_EDIT4, m_Culture);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CADODlg, CDialog)
	//{{AFX_MSG_MAP(CADODlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTADD, OnButadd)
	ON_NOTIFY(NM_CLICK, IDC_LIST1, OnClickList1)
	ON_BN_CLICKED(IDC_BUTMOD, OnButmod)
	ON_BN_CLICKED(IDC_BUTDEL, OnButdel)
	ON_BN_CLICKED(IDC_BUTCLE, OnButcle)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CADODlg message handlers

BOOL CADODlg::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
	m_Grid.SetExtendedStyle(LVS_EX_FLATSB
		|LVS_EX_FULLROWSELECT
		|LVS_EX_HEADERDRAGDROP
		|LVS_EX_ONECLICKACTIVATE
		|LVS_EX_GRIDLINES);
	m_Grid.InsertColumn(0,"编号",LVCFMT_LEFT,110,0);
	m_Grid.InsertColumn(1,"姓名",LVCFMT_LEFT,110,1);
	m_Grid.InsertColumn(2,"性别",LVCFMT_LEFT,110,2);
	m_Grid.InsertColumn(3,"学历",LVCFMT_LEFT,110,3);
	AddToGrid();
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CADODlg::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 CADODlg::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 CADODlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CADODlg::OnInitADOConn()
{
	try
	{
		//创建连接对象实例
		m_pConnection.CreateInstance("ADODB.Connection");
		//设置连接字符串
		CString strConnect="DRIVER={Microsoft Access Driver (*.mdb)};\
			uid=;pwd=;DBQ=shujuku.mdb;";
		//使用Open方法连接数据库
		m_pConnection->Open((_bstr_t)strConnect,"","",adModeUnknown);
	}
	catch(_com_error e)
	{
		AfxMessageBox(e.Description());
	}
}

void CADODlg::ExitConnect()
{
	//关闭记录集和连接
    if(m_pRecordset!=NULL)
		m_pRecordset->Close();
	m_pConnection->Close();
}

void CADODlg::AddToGrid()
{
	//连接数据库
	OnInitADOConn();
	//设置查询字符串
	_bstr_t bstrSQL = "select * from employees order by 编号 desc";
	//创建记录集指针对象实例
	m_pRecordset.CreateInstance(__uuidof(Recordset));
	//打开记录集
	m_pRecordset->Open(bstrSQL,m_pConnection.GetInterfacePtr(),adOpenDynamic,
		adLockOptimistic,adCmdText);
	while(!m_pRecordset->adoEOF)
	{
		m_Grid.InsertItem(0,"");
		m_Grid.SetItemText(0,0,(char*)(_bstr_t)m_pRecordset->GetCollect("编号"));
		m_Grid.SetItemText(0,1,(char*)(_bstr_t)m_pRecordset->GetCollect("姓名"));
		m_Grid.SetItemText(0,2,(char*)(_bstr_t)m_pRecordset->GetCollect("性别"));
		m_Grid.SetItemText(0,3,(char*)(_bstr_t)m_pRecordset->GetCollect("学历"));
		//将记录集指针移动到下一条记录
		m_pRecordset->MoveNext();
	}
	//断开数据库连接
	ExitConnect();
}

void CADODlg::OnButadd() 
{
	UpdateData(TRUE);
	if(m_ID.IsEmpty() || m_Name.IsEmpty() || m_Sex.IsEmpty() || m_Culture.IsEmpty())
	{
		MessageBox("基础信息不能为空！");
		return;
	}
	OnInitADOConn();
	_bstr_t sql;
	sql = "select * from employees";
	m_pRecordset.CreateInstance(__uuidof(Recordset));
	m_pRecordset->Open(sql,m_pConnection.GetInterfacePtr(),adOpenDynamic,
		adLockOptimistic,adCmdText);
	try
	{
		m_pRecordset->AddNew(); //添加新行
		m_pRecordset->PutCollect("编号",(_bstr_t)m_ID);
		m_pRecordset->PutCollect("姓名",(_bstr_t)m_Name);
		m_pRecordset->PutCollect("性别",(_bstr_t)m_Sex);
		m_pRecordset->PutCollect("学历",(_bstr_t)m_Culture);
		m_pRecordset->Update(); //更新数据表
		ExitConnect();
	}
	catch(...)
	{
		MessageBox("操作失败");
		return;
	}
	MessageBox("添加成功");
	m_Grid.DeleteAllItems(); //删除列表控件
	AddToGrid();			 
}

void CADODlg::OnClickList1(NMHDR* pNMHDR, LRESULT* pResult) 
{
	// TODO: Add your control notification handler code here
	pos = m_Grid.GetSelectionMark();
	m_ID = m_Grid.GetItemText(pos,0);
	m_Name = m_Grid.GetItemText(pos,1);
	m_Sex = m_Grid.GetItemText(pos,2);
	m_Culture = m_Grid.GetItemText(pos,3);
	UpdateData(FALSE);
	*pResult = 0;
}

void CADODlg::OnButmod() 
{
	UpdateData(TRUE);
	if(m_ID.IsEmpty() || m_Name.IsEmpty() || m_Sex.IsEmpty() || m_Culture.IsEmpty())
	{
		MessageBox("基础信息不能为空！");
		return;
	}
	OnInitADOConn();
	_bstr_t sql;
	sql = "select * from employees";
	m_pRecordset.CreateInstance(__uuidof(Recordset));
	m_pRecordset->Open(sql,m_pConnection.GetInterfacePtr(),adOpenDynamic,
		adLockOptimistic,adCmdText);
	try
	{
		m_pRecordset->Move((long)pos,vtMissing);
		m_pRecordset->PutCollect("编号",(_bstr_t)m_ID);
		m_pRecordset->PutCollect("姓名",(_bstr_t)m_Name);
		m_pRecordset->PutCollect("性别",(_bstr_t)m_Sex);
		m_pRecordset->PutCollect("学历",(_bstr_t)m_Culture);
		m_pRecordset->Update();
		ExitConnect();
	}
	catch(...)
	{
		MessageBox("操作失败");
		return;
	}
	MessageBox("修改成功");
	m_Grid.DeleteAllItems();
	AddToGrid();
}

void CADODlg::OnButdel() 
{
	OnInitADOConn();
	_bstr_t sql;
	sql = "select * from employees";
	m_pRecordset.CreateInstance(__uuidof(Recordset));
	m_pRecordset->Open(sql,m_pConnection.GetInterfacePtr(),adOpenDynamic,
		adLockOptimistic,adCmdText);
	try
	{
		m_pRecordset->Move(pos,vtMissing);
		m_pRecordset->Delete(adAffectCurrent);
		m_pRecordset->Update();
		ExitConnect();
	}
	catch(...)
	{
		MessageBox("操作失败");
		return;
	}
	MessageBox("删除成功");
	m_Grid.DeleteAllItems();
	AddToGrid();
}

void CADODlg::OnButcle() 
{
	m_ID = "";
	m_Name = "";
	m_Sex = "";
	m_Culture = "";
	UpdateData(FALSE);
}