scoreclassstatdlg.cpp

该系统前台采用C++语言

// ScoreClassStatDlg.cpp : implementation file
//

#include "stdafx.h"
#include "school.h"
#include "ScoreClassStatDlg.h"
#include "classset.h"
#include "examtimeset.h"
#include "examtypeset.h"

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

/////////////////////////////////////////////////////////////////////////////
// CScoreClassStatDlg dialog


CScoreClassStatDlg::CScoreClassStatDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CScoreClassStatDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CScoreClassStatDlg)
	m_strClass = _T("");
	m_strTime = _T("");
	m_strType = _T("");
	//}}AFX_DATA_INIT
}


void CScoreClassStatDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CScoreClassStatDlg)
	DDX_Control(pDX, IDC_LIST2, m_ctrList);
	DDX_Control(pDX, IDC_COMBO_TYPE, m_ctrType);
	DDX_Control(pDX, IDC_COMBO_TIME, m_ctrTime);
	DDX_Control(pDX, IDC_COMBO_CLASS, m_ctrClass);
	DDX_CBString(pDX, IDC_COMBO_CLASS, m_strClass);
	DDX_CBString(pDX, IDC_COMBO_TIME, m_strTime);
	DDX_CBString(pDX, IDC_COMBO_TYPE, m_strType);
	//}}AFX_DATA_MAP
}


BEGIN_MESSAGE_MAP(CScoreClassStatDlg, CDialog)
	//{{AFX_MSG_MAP(CScoreClassStatDlg)
	ON_BN_CLICKED(IDC_BUTTON_STAT, OnButtonStat)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CScoreClassStatDlg message handlers

BOOL CScoreClassStatDlg::OnInitDialog() 
{
	CDialog::OnInitDialog();
	
	CString strSQL;
	//初始化班级
	CClassSet ClassSet ;
	strSQL="select * from class";
	if(!ClassSet.Open(AFX_DB_USE_DEFAULT_TYPE,strSQL))
	{
		AfxMessageBox("打开数据库失败!");
	}	
	while(!ClassSet.IsEOF())
	{
		m_ctrClass.AddString(ClassSet.m_code);
		ClassSet.MoveNext();
	}
	ClassSet.Close();
	//初始化时间段
	CExamtimeSet TimeSet ;
	strSQL="select * from examtime";
	if(!TimeSet.Open(AFX_DB_USE_DEFAULT_TYPE,strSQL))
	{
		AfxMessageBox("打开数据库失败!");
	}	
	while(!TimeSet.IsEOF())
	{
		m_ctrTime.AddString(TimeSet.m_time);
		TimeSet.MoveNext();
	}
	TimeSet.Close();
	//初始化考试类型
	CExamtypeSet TypeSet ;
	strSQL="select * from examtype";
	if(!TypeSet.Open(AFX_DB_USE_DEFAULT_TYPE,strSQL))
	{
		AfxMessageBox("打开数据库失败!");
	}	
	while(!TypeSet.IsEOF())
	{
		m_ctrType.AddString(TypeSet.m_name);
		TypeSet.MoveNext();
	}
	TypeSet.Close();

	//初始化成绩列表
	m_ctrList.InsertColumn(0,"科目");
	m_ctrList.InsertColumn(1,"参考人数");
	m_ctrList.InsertColumn(2,"缺考人数");
	m_ctrList.InsertColumn(3,"平均成绩");
	m_ctrList.InsertColumn(4,"不及格人数");
	m_ctrList.InsertColumn(5,"及格率");
	m_ctrList.InsertColumn(6,"优秀人数");
	m_ctrList.InsertColumn(7,"优秀率");

	m_ctrList.SetColumnWidth(0,100);
	m_ctrList.SetColumnWidth(1,60);
	m_ctrList.SetColumnWidth(2,60);
	m_ctrList.SetColumnWidth(3,60);
	m_ctrList.SetColumnWidth(4,80);
	m_ctrList.SetColumnWidth(5,60);
	m_ctrList.SetColumnWidth(6,60);
	m_ctrList.SetColumnWidth(7,60);

	m_ctrList.SetExtendedStyle(LVS_EX_FULLROWSELECT|LVS_EX_GRIDLINES);	
	
	return TRUE;  // return TRUE unless you set the focus to a control
	              // EXCEPTION: OCX Property Pages should return FALSE
}

void CScoreClassStatDlg::OnButtonStat() 
{
	UpdateData();
	if(m_strClass.IsEmpty())
	{
		AfxMessageBox("请选择班级");
		return;
	}
	if(m_strTime.IsEmpty())
	{
		AfxMessageBox("请选择考试时间段");
		return;
	}
	if(m_strType.IsEmpty())
	{
		AfxMessageBox("请选择考试类型");
		return;
	}

	m_ctrList.DeleteAllItems();
	m_ctrList.SetRedraw(FALSE);

	CString strSQL;
	CString strValue="0";

	CDatabase db;
	db.Open(_T("school"));
	CRecordset rs1(&db);
	CRecordset rs2(&db);
	CRecordset rs3(&db);
	CRecordset rs4(&db);
	
	strSQL.Format("select subject, \
		count(ID) as student ,\
		sum(score) as total from score \
		where class = '%s' and time = '%s' \
		and type = '%s' group by subject"
		,m_strClass,m_strTime,m_strType);

	if(!rs1.Open(CRecordset::forwardOnly,strSQL))
	{
		MessageBox("打开数据库失败!","数据库错误",MB_OK);
		return ;
	}
	int i=0;
	int nStudent =0,nPass=0,nTotal=0,nSuper;
	CString strSubject="";
	char buffer[20];
	while(!rs1.IsEOF())
	{
		//科目
		rs1.GetFieldValue("subject",strValue);
		m_ctrList.InsertItem(i,strValue);
		strSubject = strValue;
		//参考人数
		rs1.GetFieldValue("student",strValue);
		nStudent=atoi(strValue);
		m_ctrList.SetItemText(i,1,strValue);
		//缺考人数
		strSQL.Format("select count(ID) as nAbsent from score \
			where class = '%s' and time = '%s' \
			and type = '%s' and absent = '是' \
			and subject = '%s' "
			,m_strClass,m_strTime,m_strType,strSubject);
		if(!rs2.Open(CRecordset::forwardOnly,strSQL))
		{
			rs1.Close();
			MessageBox("打开数据库失败!","数据库错误",MB_OK);
			return ;
		}
		rs2.GetFieldValue("nAbsent",strValue);
		m_ctrList.SetItemText(i,2,strValue);
		rs2.Close();
		//平均成绩
		rs1.GetFieldValue("total",strValue);
		nTotal=atoi(strValue);
		
		_itoa(nTotal/nStudent,buffer,10);
		m_ctrList.SetItemText(i,3,buffer);
		//不及格人数
		strSQL.Format("select count(ID) as nPass from score \
			where class = '%s' and time = '%s' \
			and type = '%s' and score < 60 \
			and subject = '%s' "
			,m_strClass,m_strTime,m_strType,strSubject);
		if(!rs3.Open(CRecordset::forwardOnly,strSQL))
		{
			rs1.Close();
			MessageBox("打开数据库失败!","数据库错误",MB_OK);
			return ;
		}
		rs3.GetFieldValue("nPass",strValue);
		m_ctrList.SetItemText(i,4,strValue);
		rs3.Close();
		//及格率
		nPass = nStudent - atoi(strValue);
		itoa( (int)(nPass*100/nStudent), buffer,10 );
		m_ctrList.SetItemText(i,5,buffer);
		//优秀率
		strSQL.Format("select count(ID) as nSuper from score \
			where class = '%s' and time = '%s' \
			and type = '%s' and score >= 60 \
			and subject = '%s' "
			,m_strClass,m_strTime,m_strType,strSubject);
		if(!rs4.Open(CRecordset::forwardOnly,strSQL))
		{
			rs1.Close();
			MessageBox("打开数据库失败!","数据库错误",MB_OK);
			return ;
		}
		rs4.GetFieldValue("nSuper",strValue);
		m_ctrList.SetItemText(i,6,strValue);
		rs4.Close();
		//优秀率
		nSuper = atoi(strValue);
		itoa( (int)(nSuper*100/nStudent), buffer,10 );
		m_ctrList.SetItemText(i,7,buffer);

		i++;
		rs1.MoveNext();
	}
	rs1.Close();	
	m_ctrList.SetRedraw(TRUE);
	
}