MFC + Access 用户验证程序（初级数据库编程）

mfc + access 用户验证程序（初级数据库编程） 企业即时通讯 软件流程：弹出对话框，要求输入用户及密码，正确则跳到主对话框，错误则要求重新输入，关闭则什么也不做退出。三无程序，有用的或刚学ADO的看看。 ////////////////////////////////////////// s

mfc + access 用户验证程序（初级数据库编程）

企业即时通讯

软件流程： 弹出对话框，要求输入用户及密码，正确则跳到主对话框，错误则要求重新输入，关闭则什么也不做退出。 三无程序，有用的或刚学ADO的看看。

////////////////////////////////////////// stdafx.h

// stdafx.h : include file for standard system include files, //  or project specific include files that are used frequently, but //      are changed infrequently //

#if !defined(AFX_STDAFX_H__B170E8A6_57B5_4B19_A471_C368C30871F1__INCLUDED_) #define AFX_STDAFX_H__B170E8A6_57B5_4B19_A471_C368C30871F1__INCLUDED_

#if _MSC_VER > 1000 #pragma once #endif // _MSC_VER > 1000

#define VC_EXTRALEAN  // Exclude rarely-used stuff from Windows headers

#include          // MFC core and standard components #include          // MFC extensions #include         // MFC Automation classes #include   // MFC support for Internet Explorer 4 Common Controls #ifndef _AFX_NO_AFXCMN_SUPPORT #include    // MFC support for Windows Common Controls #endif // _AFX_NO_AFXCMN_SUPPORT

#include #import "c:/program files/common files/system/ado/msado15.dll" no_namespace rename("EOF","adoEOF")

//{{AFX_INSERT_LOCATION}} // Microsoft Visual C++ will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_STDAFX_H__B170E8A6_57B5_4B19_A471_C368C30871F1__INCLUDED_) ---------------------------------------------------------------------------------------------------------------------------------------------------

#if !defined(AFX_LOGINDLG_H__C757DD49_652B_41A1_84C3_EC0D3C40A07F__INCLUDED_) #define AFX_LOGINDLG_H__C757DD49_652B_41A1_84C3_EC0D3C40A07F__INCLUDED_

#if _MSC_VER > 1000 #pragma once #endif // _MSC_VER > 1000 // LoginDlg.h : header file //

///////////////////////////////////////////////////////////////////////////// // CLoginDlg dialog

class CLoginDlg : public CDialog { // Construction public:  BOOL UserValid();  CLoginDlg(CWnd* pParent = NULL);   // standard constructor

// Dialog Data  //{{AFX_DATA(CLoginDlg)  enum { IDD = IDD_DIALOG1 };   // NOTE: the ClassWizard will add data members here  //}}AFX_DATA

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

// Implementation protected:

 // Generated message map functions  //{{AFX_MSG(CLoginDlg)  virtual void OnOK();  virtual void OnCancel();  virtual BOOL OnInitDialog();  //}}AFX_MSG  DECLARE_MESSAGE_MAP() };

//{{AFX_INSERT_LOCATION}} // Microsoft Visual C++ will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_LOGINDLG_H__C757DD49_652B_41A1_84C3_EC0D3C40A07F__INCLUDED_)

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// LoginDlg.cpp : implementation file //

#include "stdafx.h" #include "userlogin.h" #include "LoginDlg.h" #include "userloginDlg.h"

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

///////////////////////////////////////////////////////////////////////////// // CLoginDlg dialog

CLoginDlg::CLoginDlg(CWnd* pParent /*=NULL*/)  : CDialog(CLoginDlg::IDD, pParent) {  //{{AFX_DATA_INIT(CLoginDlg)   // NOTE: the ClassWizard will add member initialization here  //}}AFX_DATA_INIT }

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

BEGIN_MESSAGE_MAP(CLoginDlg, CDialog)  //{{AFX_MSG_MAP(CLoginDlg)  //}}AFX_MSG_MAP END_MESSAGE_MAP()

///////////////////////////////////////////////////////////////////////////// // CLoginDlg message handlers

void CLoginDlg::OnOK() {  // TODO: Add extra validation here /* char *szBuf = new char[128];  GetDlgItemText(IDC_EDIT1, szBuf, 128);  MessageBox(szBuf);*/  if (! UserValid())   return;

 CDialog::OnOK(); }

void CLoginDlg::OnCancel() {  // TODO: Add extra cleanup here

 CDialog::OnCancel(); }

BOOL CLoginDlg::UserValid() {  _ConnectionPtr &cPtr = ((CUserloginDlg*)GetParent())->m_pConn;  char* szUserName = (char*)((CUserloginDlg*)GetParent())->m_szUserName;

 _RecordsetPtr pRs;  pRs.CreateInstance(__uuidof(Recordset));

 // 确保用户名输入不为空  char szName[128];  GetDlgItemText(IDC_EDIT1, szName, 128);  if (NULL == szName[0])  {   AfxMessageBox("用户名不能为空！");   return FALSE;  }  char szpw[128];  GetDlgItemText(IDC_EDIT2, szpw, 128);  if (NULL == szpw[0])  {   AfxMessageBox("密码不能为空！");   return FALSE;  }

 // 从 account 表里读出用户信息  char szSQL[256];  sprintf(szSQL, "%s%s", "SELECT * FROM account where username='", szName);  strcat(szSQL, "'");

 try  {   HRESULT hr = pRs->Open(szSQL,    cPtr.GetInterfacePtr(), adOpenDynamic, adLockOptimistic, adCmdText);

  // 确保用户存在   if (pRs->adoEOF)   {    AfxMessageBox("用户名无效，请重新输入！");    pRs->Close();    pRs.Release();    return FALSE;   }  }

 catch (_com_error e)  {   AfxMessageBox(e.ErrorMessage());  }

 CString l_str;  variant_t var;

 try  {   var = pRs->GetCollect(_variant_t("password"));   if (var.vt != VT_NULL)   {    l_str = (LPCTSTR)_bstr_t(var);    if (l_str == szpw)    {    // AfxMessageBox("密码正确");     strcpy(szUserName, szName);    }    else    {     AfxMessageBox("密码错误，请重新输入！");     return FALSE;    }   }   else   {    l_str = _T("none");    AfxMessageBox(l_str);    return FALSE;   }  }  catch (_com_error e)  {   AfxMessageBox(e.Description());  }  pRs->Close();  pRs.Release(); }

BOOL CLoginDlg::OnInitDialog() {  CDialog::OnInitDialog();    // TODO: Add extra initialization here  return TRUE;  // return TRUE unless you set the focus to a control                // EXCEPTION: OCX Property Pages should return FALSE }

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// userlogin.h : main header file for the USERLOGIN application //

#if !defined(AFX_USERLOGIN_H__433A5C98_5C19_49A2_8ACA_5AD5FF116D77__INCLUDED_) #define AFX_USERLOGIN_H__433A5C98_5C19_49A2_8ACA_5AD5FF116D77__INCLUDED_

#if _MSC_VER > 1000 #pragma once #endif // _MSC_VER > 1000

#ifndef __AFXWIN_H__  #error include 'stdafx.h' before including this file for PCH #endif

#include "resource.h"  // main symbols

///////////////////////////////////////////////////////////////////////////// // CUserloginApp: // See userlogin.cpp for the implementation of this class //

class CUserloginApp : public CWinApp { public:  CUserloginApp();

// Overrides  // ClassWizard generated virtual function overrides  //{{AFX_VIRTUAL(CUserloginApp)  public:  virtual BOOL InitInstance();  //}}AFX_VIRTUAL

// Implementation

 //{{AFX_MSG(CUserloginApp)   // NOTE - the ClassWizard will add and remove member functions here.   //    DO NOT EDIT what you see in these blocks of generated code !  //}}AFX_MSG  DECLARE_MESSAGE_MAP() };

/////////////////////////////////////////////////////////////////////////////

//{{AFX_INSERT_LOCATION}} // Microsoft Visual C++ will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_USERLOGIN_H__433A5C98_5C19_49A2_8ACA_5AD5FF116D77__INCLUDED_) ----------------------------------------------------------------------------------------------------------------------------------------------

// userlogin.cpp : Defines the class behaviors for the application. //

#include "stdafx.h" #include "userlogin.h" #include "userloginDlg.h"

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

///////////////////////////////////////////////////////////////////////////// // CUserloginApp

BEGIN_MESSAGE_MAP(CUserloginApp, CWinApp)  //{{AFX_MSG_MAP(CUserloginApp)   // NOTE - the ClassWizard will add and remove mapping macros here.   //    DO NOT EDIT what you see in these blocks of generated code!  //}}AFX_MSG  ON_COMMAND(ID_HELP, CWinApp::OnHelp) END_MESSAGE_MAP()

///////////////////////////////////////////////////////////////////////////// // CUserloginApp construction

CUserloginApp::CUserloginApp() {  // TODO: add construction code here,  // Place all significant initialization in InitInstance }

///////////////////////////////////////////////////////////////////////////// // The one and only CUserloginApp object

CUserloginApp theApp;

///////////////////////////////////////////////////////////////////////////// // CUserloginApp initialization

BOOL CUserloginApp::InitInstance() {  OleInitialize(NULL);  AfxEnableControlContainer();

 // Standard initialization  // If you are not using these features and wish to reduce the size  //  of your final executable, you should remove from the following  //  the specific initialization routines you do not need.

#ifdef _AFXDLL  Enable3dControls();   // Call this when using MFC in a shared DLL #else  Enable3dControlsStatic(); // Call this when linking to MFC statically #endif

 CUserloginDlg dlg;  m_pMainWnd = &dlg;  int nResponse = dlg.DoModal();  if (nResponse == IDOK)  {   // TODO: Place code here to handle when the dialog is   //  dismissed with OK  }  else if (nResponse == IDCANCEL)  {   // TODO: Place code here to handle when the dialog is   //  dismissed with Cancel  }

 // Since the dialog has been closed, return FALSE so that we exit the  //  application, rather than start the application's message pump.  return FALSE; }