ad_modify.cpp

数据结构大作业

// ad_modify.cpp : implementation file
//

#include "stdafx.h"
#include "salsary.h"
#include "ad_modify.h"

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

/////////////////////////////////////////////////////////////////////////////
// ad_modify dialog


ad_modify::ad_modify(CWnd* pParent /*=NULL*/)
	: CDialog(ad_modify::IDD, pParent)
{
	//{{AFX_DATA_INIT(ad_modify)
	m_age = _T("");
	m_key = _T("");
	m_name = _T("");
	m_salary = _T("");
	m_user = _T("");
	//}}AFX_DATA_INIT
}


void ad_modify::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(ad_modify)
	DDX_Control(pDX, IDC_LIST1, m_list);
	DDX_Text(pDX, IDC_age, m_age);
	DDV_MaxChars(pDX, m_age, 10);
	DDX_Text(pDX, IDC_key, m_key);
	DDV_MaxChars(pDX, m_key, 10);
	DDX_Text(pDX, IDC_name, m_name);
	DDV_MaxChars(pDX, m_name, 10);
	DDX_Text(pDX, IDC_salary, m_salary);
	DDV_MaxChars(pDX, m_salary, 10);
	DDX_Text(pDX, IDC_user, m_user);
	DDV_MaxChars(pDX, m_user, 10);
	//}}AFX_DATA_MAP
}


BEGIN_MESSAGE_MAP(ad_modify, CDialog)
	//{{AFX_MSG_MAP(ad_modify)
	ON_BN_CLICKED(IDC_BUTTON2, OnButton2)
	ON_LBN_SELCHANGE(IDC_LIST1, OnSelchangeList1)
	ON_BN_CLICKED(IDC_BUTTON1, OnButton1)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// ad_modify message handlers

void ad_modify::OnButton2() 
{
EndDialog(1);	// TODO: Add your control notification handler code here
	
}
#include"wh.h"
BOOL ad_modify::OnInitDialog() 
{
	CDialog::OnInitDialog();
	fstream iof("C:\\user.dat",ios::binary|ios::in|ios::out);
    if(!iof)
	{cerr<<"文件不能打开"<<endl;
    return FALSE;
}
	user_data data;
    iof.seekp(0,ios::end);
    long posEnd=iof.tellp();//记录末尾指针的位置	
	iof.seekp(0,ios::beg);
	do
	{iof.read((char*)&data,sizeof(user_data));
	m_user=data.user;
	m_key=data.key;
	m_name=data.name;
    m_age.Format("%d",data.age);
	m_salary.Format("%d",data.salary);
    int nIndex=m_list.AddString(m_user);//向列表框添加数据
    strcpy((data.key),(LPSTR)(LPCTSTR)(m_key));
    strcpy((data.name),(LPSTR)(LPCTSTR)(m_name));
	(data.age)=atoi(m_age);
    (data.salary)=atoi(m_salary);
	m_list.SetItemDataPtr(nIndex,new user_data(data));
	UpdateData(FALSE);	}
	while(iof.tellp()!=posEnd);
	
		
	// TODO: Add extra initialization here
	
	return TRUE;  // return TRUE unless you set the focus to a control
	              // EXCEPTION: OCX Property Pages should return FALSE
}

#include"wh.h"
void ad_modify::OnSelchangeList1() 
{
int nIndex=m_list.GetCurSel();
if(nIndex!=LB_ERR)
{m_list.GetText(nIndex,m_user);
user_data*data=(user_data*)m_list.GetItemDataPtr(nIndex);
m_key=(*data).key;
m_name=(*data).name;
m_age.Format("%d",(*data).age);
m_salary.Format("%d",(*data).salary);
UpdateData(FALSE);}
	 // TODO: Add your control notification handler code here
	
}


#include"wh.h"
void ad_modify::OnButton1() 
{int t=MessageBox("是否要进行修改?","提示!",4+32);
if(t==6)
{UpdateData();
int nIndex=m_list.GetCurSel();
if(nIndex!=LB_ERR)
{fstream iof("C:\\user.dat",ios::binary|ios::in|ios::out);
if(!iof)
{cerr<<"文件不能打开"<<endl;
return;
}
user_data data;
iof.seekp(0,ios::end);
long posEnd=iof.tellp();
iof.seekp(0,ios::beg);
CString user;
do
{iof.read((char*)&data,sizeof(user_data));
user=data.user; 
}while(m_user.Compare(user)&&iof.tellp()!=posEnd);
if(!m_user.Compare(user))
{strcpy((data.name),(LPSTR)(LPCTSTR)(m_name));
(data.age)=atoi(m_age);
(data.salary)=atoi(m_salary);
m_list.SetItemDataPtr(nIndex,new user_data(data));
iof.seekp(-long(sizeof(user_data)),ios::cur);//文件指针复位
iof.write((char*)&data,sizeof(user_data));
MessageBox("修改用户资料成功!");
iof.close();}
	// TODO: Add your control notification handler code here
	
}}}