www.gusucode.com > ADO第一次亲密接触 -- ADO开发实践之一C++源码程序 > ADO第一次亲密接触 -- ADO开发实践之一/ADOTest1Dlg.cpp

    // ADOTest1Dlg.cpp : implementation file
//

#include "stdafx.h"
#include "ADOTest1.h"
#include "ADOTest1Dlg.h"

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

extern CADOTest1App theApp;
/////////////////////////////////////////////////////////////////////////////
// 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()

/////////////////////////////////////////////////////////////////////////////
// CADOTest1Dlg dialog

CADOTest1Dlg::CADOTest1Dlg(CWnd* pParent /*=NULL*/)
	: CDialog(CADOTest1Dlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CADOTest1Dlg)
	m_nUserID = 0;
	m_nOld = 0;
	m_sUsername = _T("");
	m_tBirthday = COleDateTime::GetCurrentTime();
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
	m_nCurrentSel = -1;
	m_bSuccess = FALSE;
	m_bAutoSave = TRUE;

}

void CADOTest1Dlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CADOTest1Dlg)
	DDX_Control(pDX, IDC_DELITEM, m_cDelItem);
	DDX_Control(pDX, IDC_ADDITEM, m_cAddItem);
	DDX_Control(pDX, IDC_USERLIST, m_userlist);
	DDX_Text(pDX, IDC_USERID, m_nUserID);
	DDX_Text(pDX, IDC_OLD, m_nOld);
	DDX_Text(pDX, IDC_USERNAME, m_sUsername);
	DDX_DateTimeCtrl(pDX, IDC_DATETIMEPICKER1, m_tBirthday);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CADOTest1Dlg, CDialog)
	//{{AFX_MSG_MAP(CADOTest1Dlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_ADDITEM, OnAdditem)
	ON_BN_CLICKED(IDC_DELITEM, OnDelitem)
	ON_NOTIFY(LVN_ITEMCHANGED, IDC_USERLIST, OnItemchangedUserlist)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CADOTest1Dlg message handlers

BOOL CADOTest1Dlg::OnInitDialog()
{
	CDialog::OnInitDialog();
	m_cDelItem.EnableWindow(FALSE);
	::SendMessage(m_userlist.m_hWnd, LVM_SETEXTENDEDLISTVIEWSTYLE,LVS_EX_FULLROWSELECT, LVS_EX_FULLROWSELECT);
	//////////为列表控件添加列//////////
	m_userlist.InsertColumn(0,"用户ID",LVCFMT_LEFT,60);
	m_userlist.InsertColumn(1,"用户名",LVCFMT_LEFT,100);
	m_userlist.InsertColumn(2,"年龄",LVCFMT_LEFT,60);
	m_userlist.InsertColumn(3,"生日",LVCFMT_LEFT,100);
	//////////读取数据库中的信息添加到列表控件///////////
	int nItem;
	_variant_t vUsername,vBirthday,vID,vOld;
	try
	{
		m_pRecordset.CreateInstance("ADODB.Recordset");
		m_pRecordset->Open("SELECT * FROM users",_variant_t((IDispatch*)theApp.m_pConnection,true),adOpenStatic,adLockOptimistic,adCmdText);
		m_bSuccess = TRUE;
		while(!m_pRecordset->adoEOF)
		{
			vID = m_pRecordset->GetCollect("ID");
			vUsername = m_pRecordset->GetCollect("username");
			vOld = m_pRecordset->GetCollect("old");
			vBirthday = m_pRecordset->GetCollect("birthday");
			nItem=m_userlist.InsertItem(0xffff,(_bstr_t)vID);
			m_userlist.SetItem(nItem,1,1,(_bstr_t)vUsername,NULL,0,0,0);
			m_userlist.SetItem(nItem,2,1,(_bstr_t)vOld,NULL,0,0,0);
			m_userlist.SetItem(nItem,3,1,(_bstr_t)vBirthday,NULL,0,0,0);

			m_pRecordset->MoveNext();
		}
	}
	catch(_com_error e)///捕捉异常
	{
		AfxMessageBox("读取数据库失败!");///显示错误信息
	}

	// 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
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CADOTest1Dlg::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 CADOTest1Dlg::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 CADOTest1Dlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CADOTest1Dlg::OnOK() 
{
	if(m_bSuccess)
	{
		m_pRecordset->Update();
		m_pRecordset->Close();
	}
	CDialog::OnOK();
}

void CADOTest1Dlg::OnAdditem() 
{
	if(UpdateData())
	if(m_sUsername.GetLength()>0)
	{
		m_pRecordset->AddNew();
		m_nCurrentSel = m_userlist.InsertItem(0xffff,"");
		SaveData();///保存数据
		m_userlist.SetItemState(m_nCurrentSel,LVIS_SELECTED|LVIS_FOCUSED,LVIS_SELECTED|LVIS_FOCUSED);
		m_userlist.SetHotItem(m_nCurrentSel);
		m_userlist.SetFocus();
	}
	else
		AfxMessageBox("请输入用户名");
}

void CADOTest1Dlg::OnDelitem() 
{
	m_bAutoSave = FALSE;
	if(m_nCurrentSel >= 0)
	{
		m_userlist.DeleteItem(m_nCurrentSel);
		int count = m_userlist.GetItemCount();
		if(count <= m_nCurrentSel)
			m_nCurrentSel = count-1;
		m_pRecordset->Delete(adAffectCurrent);
		m_pRecordset->MoveNext();
		LoadData();
		m_userlist.SetItemState(m_nCurrentSel,LVIS_SELECTED|LVIS_FOCUSED,LVIS_SELECTED|LVIS_FOCUSED);
		m_userlist.SetFocus();
	}
	m_bAutoSave = TRUE;
}

//////////在选择列表框的时候调用///////////////////
void CADOTest1Dlg::OnItemchangedUserlist(NMHDR* pNMHDR, LRESULT* pResult) 
{
	NM_LISTVIEW* pNMListView = (NM_LISTVIEW*)pNMHDR;
	if(pNMListView->uNewState&LVIS_SELECTED)
	{
	UpdateData();
	SaveData();///保存旧数据
	m_nCurrentSel = pNMListView->iItem;
	LoadData();///加载新数据
	m_cDelItem.EnableWindow();
	}
	*pResult = 0;
}

//////将记录集中的数据加载到编辑框/////
void CADOTest1Dlg::LoadData()
{
	m_pRecordset->Move(m_nCurrentSel,_variant_t((long)adBookmarkFirst));
	vUserID = m_pRecordset->GetCollect("ID");
	vUsername = m_pRecordset->GetCollect("username");
	vOld = m_pRecordset->GetCollect("old");
	vBirthday = m_pRecordset->GetCollect("birthday");
	m_nUserID = vUserID.lVal;
	m_sUsername = (LPCTSTR)(_bstr_t)vUsername;
	m_nOld = vOld.lVal;
	m_tBirthday = vBirthday;
	UpdateData(FALSE);
}

/////将编辑框的数据保存到记录集与列表框
void CADOTest1Dlg::SaveData()
{
	if(!m_pRecordset->adoEOF && m_nCurrentSel >= 0 && m_bAutoSave)
	{
		vUserID = (long)m_nUserID;
		vUsername = m_sUsername;
		vOld = (long)m_nOld;
		vBirthday = m_tBirthday;
		m_pRecordset->PutCollect("ID",vUserID);
		m_pRecordset->PutCollect("username",vUsername);
		m_pRecordset->PutCollect("old",vOld);
		m_pRecordset->PutCollect("birthday",vBirthday);
		m_userlist.SetItem(m_nCurrentSel,0,LVIF_TEXT,(_bstr_t)vUserID,NULL,0,0,0);
		m_userlist.SetItem(m_nCurrentSel,1,LVIF_TEXT,(_bstr_t)vUsername,NULL,0,0,0);
		m_userlist.SetItem(m_nCurrentSel,2,LVIF_TEXT,(_bstr_t)vOld,NULL,0,0,0);
		m_userlist.SetItem(m_nCurrentSel,3,LVIF_TEXT,(_bstr_t)vBirthday,NULL,0,0,0);
	}
}