citydlg.cpp

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// CityDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Ex_CtrlSDI.h"
#include "CityDlg.h"

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

/////////////////////////////////////////////////////////////////////////////
// CCityDlg dialog


CCityDlg::CCityDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CCityDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CCityDlg)
	m_strCity = _T("");
	m_strZip = _T("");
	//}}AFX_DATA_INIT
}


void CCityDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CCityDlg)
	DDX_Control(pDX, IDC_LIST1, m_ListBox);
	DDX_Text(pDX, IDC_EDIT_CITY, m_strCity);
	DDV_MaxChars(pDX, m_strCity, 40);
	DDX_Text(pDX, IDC_EDIT_ZIP, m_strZip);
	DDV_MaxChars(pDX, m_strZip, 6);
	//}}AFX_DATA_MAP
}


BEGIN_MESSAGE_MAP(CCityDlg, CDialog)
	//{{AFX_MSG_MAP(CCityDlg)
	ON_BN_CLICKED(IDC_BUTTON_ADD, OnButtonAdd)
	ON_BN_CLICKED(IDC_BUTTON_CHANGE, OnButtonChange)
	ON_LBN_SELCHANGE(IDC_LIST1, OnSelchangeList1)
	ON_WM_DESTROY()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CCityDlg message handlers

BOOL CCityDlg::IsValidate()
{
	UpdateData();
	m_strCity.TrimLeft();
	if ( m_strCity.IsEmpty() )
	{
		MessageBox ( "城市名输入无效！" );
		return FALSE;
	}
	m_strZip.TrimLeft();
	if ( m_strZip.IsEmpty() )
	{
		MessageBox ( "邮政编码输入无效！" );
		return FALSE;
	}
	return TRUE;
}

void CCityDlg::OnButtonAdd() 
{
	if ( !IsValidate() ) return;
	int nIndex = m_ListBox.FindStringExact (-1, m_strCity);
	if (nIndex != LB_ERR) {
		MessageBox("该城市已添加");
		return;
	}
	nIndex = m_ListBox.AddString(m_strCity);
	m_ListBox.SetItemDataPtr(nIndex, new CString(m_strZip));
}

void CCityDlg::OnButtonChange() 
{
	if ( !IsValidate() ) return;
	int nIndex = m_ListBox.FindStringExact (-1, m_strCity);
	if (nIndex != LB_ERR) {
		delete (CString *)m_ListBox.GetItemDataPtr(nIndex);
		m_ListBox.SetItemDataPtr(nIndex, new CString(m_strZip));
	}
}

void CCityDlg::OnSelchangeList1() 
{
	int nIndex = m_ListBox.GetCurSel ();
	if (nIndex != LB_ERR) {
		m_ListBox.GetText(nIndex, m_strCity);
		m_strZip = * (CString *)m_ListBox.GetItemDataPtr(nIndex);
		UpdateData(FALSE);
	}		
}

void CCityDlg::OnDestroy() 
{
	for (int nIndex = m_ListBox.GetCount()-1; nIndex>=0; nIndex--)
	{
		// 删除所有与列表项相关联的CString数据，并释放内存
		delete (CString *)m_ListBox.GetItemDataPtr(nIndex);
	}
	CDialog::OnDestroy();
}