nddlg.cpp

这是一套学校设备管理系统的源码 里面有树形结构使用的很棒的方法

 // nddlg.cpp : implementation file
//

#include "stdafx.h"
#include "xxgl.h"
#include "nddlg.h"
#include "strt.h"
#include "ext.h"
#include "func.h"

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

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


void Cnddlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(Cnddlg)
	DDX_Control(pDX, IDC_nd, m_nd);
	//}}AFX_DATA_MAP

  CBitmap *bitmap;
  HBITMAP hbitmap;
  bitmap = new CBitmap();
  bitmap->LoadBitmap(IDB_qr);
  hbitmap = (*bitmap).operator HBITMAP();
  CWnd *wn;
  wn = GetDlgItem(IDOK);
  
  WPARAM wParam;
  LPARAM lParam;
  wParam =  (WPARAM) LOWORD(BS_LEFT | BS_BITMAP); // style 
  lParam =  MAKELPARAM(TRUE, 0);   // redraw flag 
  wn->SendMessage(BM_SETIMAGE, IMAGE_BITMAP,(long)hbitmap);
  

	int year;

    time_t ltime;    
	struct tm *pti;
	char tmpbuf[100];
	char buf[1000];
	char bu[1000];

    time(&ltime);    
	pti = gmtime(&ltime);
	year = pti->tm_year + 1900;
	itoa(year,buf,10);
	m_nd.SelectString(0,buf);    
}


BEGIN_MESSAGE_MAP(Cnddlg, CDialog)
	//{{AFX_MSG_MAP(Cnddlg)
	ON_CBN_EDITCHANGE(IDC_nd, OnEditchangend)
	ON_CBN_SELCHANGE(IDC_nd, OnSelchangend)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// Cnddlg message handlers

void Cnddlg::OnOK() 
{
	// TODO: Add extra validation here
	int t;
	char buf[20];

	GetDlgItemText(IDC_nd,buf,10);
    t = atoi(buf);
	if ((t < 1998)||(t > 2100)){
		MessageBox("报表年度错误.","",MB_OK);
		CWnd *wd;
		wd = GetDlgItem(IDC_nd);
		wd->SetFocus();
		return;
    }
	g_nzbb_nd = t;
	
	CDialog::OnOK();
}

void Cnddlg::OnEditchangend() 
{
	// TODO: Add your control notification handler code here
	char buf[40];
	int l,i,flag,j;
	
	GetDlgItemText(IDC_nd,buf,12);
    l = strlen(buf);
	if (l > 0){
		if (l > 4){
			buf[4] = 0;
	        SetDlgItemText(IDC_nd,buf);
        }
		for (i=0;i<l;i++){
	      if ((buf[i] < '0')||(buf[i] > '9')){
			if (i == 0){
				strcpy(buf,"2000");
			}
			else
		      buf[i] = 0;
	        SetDlgItemText(IDC_nd,buf);
		  }
		}
	}

}

void Cnddlg::OnSelchangend() 
{
	// TODO: Add your control notification handler code here
	char buf[40];
	int l,i,flag,j;
	int n;
	
	n = m_nd.GetCurSel();
	m_nd.GetLBText(n,buf);
    l = strlen(buf);
	if (l > 0){
		if (l > 4){
			buf[4] = 0;
	        SetDlgItemText(IDC_nd,buf);
        }
		for (i=0;i<l;i++){
	      if ((buf[i] < '0')||(buf[i] > '9')){
			if (i == 0){
				strcpy(buf,"2000");
			}
			else
		      buf[i] = 0;
	        SetDlgItemText(IDC_nd,buf);
		  }
		}
	}
}