listboxdlg.cpp

计算机图形学电子教案 上传者来自 兰州交通大学

// ListBoxDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Ex_CommCtrls.h"
#include "ListBoxDlg.h"

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

/////////////////////////////////////////////////////////////////////////////
// CListBoxDlg dialog


CListBoxDlg::CListBoxDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CListBoxDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CListBoxDlg)
	m_strName = _T("");
	m_nScore1 = 0;
	m_nScore2 = 0;
	m_nScore3 = 0;
	//}}AFX_DATA_INIT
}


void CListBoxDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CListBoxDlg)
	DDX_Control(pDX, IDC_LIST1, m_List);
	DDX_Text(pDX, IDC_STU_NAME, m_strName);
	DDV_MaxChars(pDX, m_strName, 20);
	DDX_Text(pDX, IDC_STU_SCORE1, m_nScore1);
	DDV_MinMaxInt(pDX, m_nScore1, 0, 100);
	DDX_Text(pDX, IDC_STU_SCORE2, m_nScore2);
	DDV_MinMaxInt(pDX, m_nScore2, 0, 100);
	DDX_Text(pDX, IDC_STU_SCORE3, m_nScore3);
	DDV_MinMaxInt(pDX, m_nScore3, 0, 100);
	//}}AFX_DATA_MAP
}


BEGIN_MESSAGE_MAP(CListBoxDlg, CDialog)
	//{{AFX_MSG_MAP(CListBoxDlg)
	ON_BN_CLICKED(IDC_DATA_ADD, OnDataAdd)
	ON_BN_CLICKED(IDC_DATA_DEL, OnDataDel)
	ON_LBN_SELCHANGE(IDC_LIST1, OnSelchangeList1)
	ON_WM_DESTROY()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CListBoxDlg message handlers

void CListBoxDlg::OnDataAdd() 
{
	// TODO: Add your control notification handler code here
	UpdateData(TRUE);
	if(m_strName.IsEmpty())      //判断m_strName是否为空
	{        MessageBox("姓名不能为空!");
	         return;
	}
	m_strName.TrimLeft();     //裁剪m_strName左边的空格
	m_strName.TrimRight();     //裁剪m_strName右边的空格
	if((m_List.FindString(-1,m_strName))!=LB_ERR)
	{          MessageBox("列表框中已有相同姓名，不能添加!");
	           return;
	}
	int nIndex = m_List.AddString(m_strName);//向列表框添加学生姓名
	//将该学生成绩与新增的列表项关联起来
	SCORE data;
	data.score1 = m_nScore1;
	data.score2 = m_nScore2;
	data.score3 = m_nScore3;
	m_List.SetItemDataPtr(nIndex,new SCORE(data));

	
}

void CListBoxDlg::OnDataDel() 
{
	// TODO: Add your control notification handler code here
	int nIndex = m_List.GetCurSel();   //获得当前选择项的索引
	if(nIndex != LB_ERR)
	{          m_List.DeleteString(nIndex);
	           m_strName.Empty();
			   m_nScore1 = m_nScore2 = m_nScore3 = 0;
			   UpdateData(FALSE);
	}
	else   MessageBox("当前没有选择或列表框操作失败!");
}

void CListBoxDlg::OnSelchangeList1() 
{
	// TODO: Add your control notification handler code here
	int nIndex = m_List.GetCurSel();
	if(nIndex != LB_ERR)
	{         m_List.GetText(nIndex,m_strName);
	          SCORE *data = (SCORE*)m_List.GetItemDataPtr(nIndex);
			  m_nScore1 = data->score1;
			  m_nScore2 = data->score2;
			  m_nScore3 = data->score3;
			  UpdateData(FALSE);
	}

	
}

void CListBoxDlg::OnDestroy() 
{	
	// TODO: Add your message handler code here
	for(int nIndex = m_List.GetCount()-1;nIndex>=0;nIndex--)
	{//删除所有与列表项相关的SCORE结构数据，并释放内存
		delete(SCORE *)m_List.GetItemDataPtr(nIndex);
	}
	CDialog::OnDestroy();//关闭对话框
}