adodlg.cpp

ADO数据库编程

// AdoDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Ado.h"
#include "AdoDlg.h"

#include "DialogDBType.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()
{
	CloseDatabase();
}

CAdoDlg::CAdoDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CAdoDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CAdoDlg)
		// NOTE: the ClassWizard will add member initialization here
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
	//初始化变量
	m_nModified = 0;
	m_bEditable = false;
	m_bDataOpened = false;
	m_bTableOpened = false;
	m_pFieldsType = NULL;
	//设置列表初始状态
	m_Grid.SetRowCount(1);
	m_Grid.SetColumnCount(1);
	m_Grid.SetFixedRowCount(1);
	m_Grid.SetFixedColumnCount(1);
	m_Grid.SetItemString(0, 0, "字段");

	CREATEINSTANCE(m_piConnection, Connection);
    CREATEINSTANCE(m_piCommand, Command);
    CREATEINSTANCE(m_piRecordset, Recordset);
}

void CAdoDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CAdoDlg)
		// NOTE: the ClassWizard will add DDX and DDV calls here
	//}}AFX_DATA_MAP
	DDX_Control(pDX, IDC_CUSTOM1, m_Grid);
}

BEGIN_MESSAGE_MAP(CAdoDlg, CDialog)
	//{{AFX_MSG_MAP(CAdoDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_DATABASE, OnDatabase)
	ON_CBN_SELCHANGE(IDC_TABLELIST, OnSelchangeTablelist)
	ON_BN_CLICKED(IDC_ADD, OnAdd)
	ON_BN_CLICKED(IDC_DELETE, OnDelete)
	ON_BN_CLICKED(IDC_MODIFY, OnModify)
	//}}AFX_MSG_MAP
	ON_NOTIFY(GVN_CLICK, IDC_CUSTOM1, OnGridClick)
	ON_NOTIFY(GVN_DBCLICK, IDC_CUSTOM1, OnGridDBClick)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CAdoDlg function


void CAdoDlg::ChangeVariantType(UINT& type)
{
	switch(type)
	{//转换数据类型定义
	case adVarWChar:
	case adVarChar:
	case adLongVarChar:
		type = (DataTypeEnum)VT_BSTR;
		break;
	case adDBDate:
	case adDBTime:
	case adDBTimeStamp:
		type = (DataTypeEnum)VT_DATE;
		break;
	}
}

void CAdoDlg::GetTablesName()
{
	int i=0;
	CString cName;
	COleVariant	vValue;
	_RecordsetPtr pRecordset;

	m_bEditable = false;

	if(!m_bDataOpened){
		AfxMessageBox("必须首先打开数据库文件");
		return;
	}
	pRecordset = m_piConnection->OpenSchema(adSchemaTables);

	CComboBox* list = (CComboBox*)GetDlgItem(IDC_TABLELIST);;
	while(!pRecordset->EndOfFile) 
	{//显示数据
		cName = RsITEM_BSTR(pRecordset, "TABLE_TYPE");
		if(cName == "TABLE"){
			cName = RsITEM_BSTR(pRecordset, "TABLE_NAME");
			list->AddString(cName);
		}
		pRecordset->MoveNext();
	}
	list->SetCurSel(0);
}

void CAdoDlg::CloseDatabase()
{
	//清除列表显示
    if (GetSafeHwnd()){
		GetDlgItem(IDC_STATIC1)->SetWindowText("当前数据库：");
		CComboBox* list = (CComboBox*)GetDlgItem(IDC_TABLELIST);
		list->ResetContent();
	}
	//清除数据显示，关闭RecordSet
	CloseTable();
	//关闭数据库连接
	if(m_bDataOpened){
		m_piConnection->Close();
		m_bDataOpened = false;
	}
}

void CAdoDlg::CloseTable()
{
	m_Grid.SetRowCount(1);
	m_Grid.SetColumnCount(1);

	if(m_bTableOpened){
		m_piRecordset->Close();
		m_bTableOpened = false;
	}
	if(m_pFieldsType){
		delete [] m_pFieldsType;//删除动态数组
		m_pFieldsType = NULL;
	}
	m_nFieldCount = 0;
	m_bEditable = false;
}

void CAdoDlg::SetButtonCtrl()
{//该函数用于设置对话框各按钮状态
	CButton* button;

	if(m_nModified){
		button = (CButton*)GetDlgItem(IDC_ADD);
		button->SetWindowText("确定");
		button = (CButton*)GetDlgItem(IDC_MODIFY);
		button->SetWindowText("取消");
		button = (CButton*)GetDlgItem(IDC_DELETE);
		button->ModifyStyle(0, WS_DISABLED);
		button = (CButton*)GetDlgItem(IDC_DATABASE);
		button->ModifyStyle(0, WS_DISABLED);
		button = (CButton*)GetDlgItem(IDC_TABLELIST);
		button->ModifyStyle(0, WS_DISABLED);
		button = (CButton*)GetDlgItem(IDCANCEL);
		button->ModifyStyle(0, WS_DISABLED);
	}
	else{
		button = (CButton*)GetDlgItem(IDC_ADD);
		button->SetWindowText("增加");
		button = (CButton*)GetDlgItem(IDC_MODIFY);
		button->SetWindowText("修改");
		button = (CButton*)GetDlgItem(IDC_DELETE);
		button->ModifyStyle(WS_DISABLED, 0);
		button = (CButton*)GetDlgItem(IDC_DATABASE);
		button->ModifyStyle(WS_DISABLED, 0);
		button = (CButton*)GetDlgItem(IDC_TABLELIST);
		button->ModifyStyle(WS_DISABLED, 0);
		button = (CButton*)GetDlgItem(IDCANCEL);
		button->ModifyStyle(WS_DISABLED, 0);
	}
	Invalidate(false);
}


/////////////////////////////////////////////////////////////////////////////
// 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
	
	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()