testbankcomdlg.cpp

演示了在VC中如何生成和调用com程序,代码简洁,方便.

// TestBankComDlg.cpp : implementation file
//

#include "stdafx.h"
#include "TestBankCom.h"
#include "TestBankComDlg.h"

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


///////////////////////////////////////CLSID & IID 
const IID IID_IAccount = {0xEF327845,0x40A8,0x4AE0,{0x90,0x50,0xEA,0x7F,0xAD,0x02,0x75,0xEA}};


const IID LIBID_BANKLib = {0x98ECF356,0x06EF,0x4F72,{0xA3,0xA0,0x6E,0xCA,0x37,0x25,0x50,0x9E}};


const CLSID CLSID_Account = {0xEB914BA1,0x3C9C,0x4321,{0xBB,0x87,0xD2,0xF8,0xE3,0xEF,0xEB,0x09}};



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

/////////////////////////////////////////////////////////////////////////////
// CTestBankComDlg dialog

CTestBankComDlg::CTestBankComDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CTestBankComDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CTestBankComDlg)
	m_CurrentValue = 0.0;
	m_Value = 0.0;
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CTestBankComDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CTestBankComDlg)
	DDX_Text(pDX, IDC_EDIT1, m_CurrentValue);
	DDX_Text(pDX, IDC_EDIT2, m_Value);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CTestBankComDlg, CDialog)
	//{{AFX_MSG_MAP(CTestBankComDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON2, OnDeposit)
	ON_BN_CLICKED(IDC_BUTTON1, OnWithdraw)
	ON_WM_DESTROY()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CTestBankComDlg message handlers

BOOL CTestBankComDlg::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
	//组件库初始化
	hr =  CoInitialize(NULL);
	if(FAILED(hr))
	{
		MessageBox("组件初始化失败!");
		return false;
	}

	//创建对象实例，并返回IUnknown 指针
	hr = CoCreateInstance(CLSID_Account, NULL, 
        CLSCTX_LOCAL_SERVER , IID_IUnknown, (void**)&pUnknown);
	if(FAILED(hr))
	{
		MessageBox("创建对象实例失败！");
		return false;
	}

	//通过IUnkonwn指针去查询接口指针,返回IAccount指针
	hr = pUnknown->QueryInterface(IID_IAccount,(void**)&pAccount);
	if(FAILED(hr))
	{
		MessageBox("没有查找的接口指针!");
		return false;
	}

	pUnknown->Release();
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

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

void CTestBankComDlg::OnDeposit() 
{
	// TODO: Add your control notification handler code here
	UpdateData(true);
	pAccount->Deposit(this->m_Value);//存钱
	pAccount->get_CurrentAccount(&(this->m_CurrentValue));//取得当前账户值
	UpdateData(false);
}

void CTestBankComDlg::OnWithdraw() 
{
	// TODO: Add your control notification handler code here
	UpdateData(true);
	double currentvalue;
	pAccount->get_CurrentAccount(&currentvalue);
	currentvalue = currentvalue-this->m_Value;
	if(currentvalue>=0)
	{
		pAccount->Withdraw(this->m_Value);
		pAccount->get_CurrentAccount(&(this->m_CurrentValue));
		UpdateData(false);
	}else
	{
		//pAccount->put_CurrentAccount(0);
		MessageBox("余额不够!");
	}
}

void CTestBankComDlg::OnDestroy() 
{
	CDialog::OnDestroy();
	
	// TODO: Add your message handler code here
	//账户接口释放
	pAccount->Release();
	///组件释放
	CoUninitialize();
}