logindlg.cpp

库存管理系统 用来管理仓库的

// LoginDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Stock.h"
#include "LoginDlg.h"
#include "Connection.h"
extern CConnection * gconn;
#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)
	m_UserName = _T("");
	m_Pwd = _T("");
	//}}AFX_DATA_INIT
}


void CLoginDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CLoginDlg)
	DDX_Text(pDX, IDC_EDIT1, m_UserName);
	DDX_Text(pDX, IDC_EDIT2, m_Pwd);
	//}}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
	 UpdateData();
	if (m_UserName == "")
	{
		MessageBox("请输入用户名");
		return;
	}
	if (m_Pwd == "")
	{
		MessageBox("请输入密码");
		return;
	}
   if(!gconn->isConnected())
	  {		MessageBox("数据库未连接");
	   return;
   }
	try
	{	
		CString sql="select * from Users where UserName ='"+m_UserName
			+"' and Pwd = '"+m_Pwd+"';";
		if(!(gconn->Execute(sql))->adoEOF)
		{   
			CDialog::OnOK();
		}
		else 
		{
			MessageBox("用户名不存在,或者是密码错误,请确认!");
	        m_Pwd="";
			m_UserName="";
			UpdateData(FALSE);
		}
		}
	catch(_com_error *e)
	{
		AfxMessageBox(e->ErrorMessage());		
	} 
	 return;








	CDialog::OnOK();
}