我的东软实习项目一：车牌识别之MFC----MyView.cpp

// MyView.cpp : implementation of the CMyView class
//

#include "stdafx.h"
#include "My.h"

#include "MyDoc.h"
#include "MyView.h"

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

/////////////////////////////////////////////////////////////////////////////
// CMyView

IMPLEMENT_DYNCREATE(CMyView, CView)

BEGIN_MESSAGE_MAP(CMyView, CView)
	//{{AFX_MSG_MAP(CMyView)
	ON_WM_LBUTTONDOWN()
	ON_WM_RBUTTONDOWN()
	ON_COMMAND(ID_Menuitem32771, OnMenuitem32771)
	//}}AFX_MSG_MAP
	// Standard printing commands
	ON_COMMAND(ID_FILE_PRINT, CView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_DIRECT, CView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_PREVIEW, CView::OnFilePrintPreview)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMyView construction/destruction

CMyView::CMyView()//:m(10)
{
	// TODO: add construction code here

}

CMyView::~CMyView()
{
}

BOOL CMyView::PreCreateWindow(CREATESTRUCT& cs)
{
	// TODO: Modify the Window class or styles here by modifying
	//  the CREATESTRUCT cs

	return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CMyView drawing

void CMyView::OnDraw(CDC* pDC)
{
	CMyDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);


//在屏幕上显示str字符串
/*	CString str;
	str.Format("计数 %d",pDoc->m);//类型转换
	pDC->TextOut(30,30,str);
	pDoc->SetModifiedFlag();//改变时提示是否保存

	CStudent stud1("中华",77);
	stud1.display(pDC,50,60);
*/
//strTemp触发OnDraw函数，在屏幕上显示输出
	pDC->TextOut(20,20,strTemp);

	
	// TODO: add draw code for native data here
}

/////////////////////////////////////////////////////////////////////////////
// CMyView printing

BOOL CMyView::OnPreparePrinting(CPrintInfo* pInfo)
{
	// default preparation
	return DoPreparePrinting(pInfo);
}

void CMyView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add extra initialization before printing
}

void CMyView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add cleanup after printing
}

/////////////////////////////////////////////////////////////////////////////
// CMyView diagnostics

#ifdef _DEBUG
void CMyView::AssertValid() const
{
	CView::AssertValid();
}

void CMyView::Dump(CDumpContext& dc) const
{
	CView::Dump(dc);
}

CMyDoc* CMyView::GetDocument() // non-debug version is inline
{
	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CMyDoc)));
	return (CMyDoc*)m_pDocument;
}
#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// CMyView message handlers

void CMyView::OnLButtonDown(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
//点击左键递增	
/*	CMyDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	pDoc->m+=1;
	//str.Format("%d",m);
	this->Invalidate();
	
	CView::OnLButtonDown(nFlags, point);
*/



//点击左键与数据库连接
/*  CStudentRecordSet rs;
	rs.Open();
	rs.AddNew();
	rs.m_ID="0004";
	rs.m_Name="华";
	rs.m_Score=103;
    rs.Update();
	rs.Close();
*/


//点左键修改值
/*	CStudentRecordSet rs;
	rs.m_strFilter="ID='0001'";//字符串过滤，找到ID为0001的数据
	rs.Open();
	rs.Edit();//修改
	rs.m_Name="夏天"//Name修改为夏天
	rs.Update();
	rs.Close();
*/
//有多个相同的需要修改 用循环
	CStudentRecordSet rs;
	rs.m_strFilter="Score=88";
	rs.Open();

	while(!rs.IsEOF())
	{
		rs.Edit();
		rs.m_Name="蓝天";
		rs.Update();
		rs.MoveNext();		
		
	}
	rs.Close();

//查找并显示
/*	int y=20;
	CStudentRecordSet rs;
	CString strTemp;
	CClientDC dc(this);
	rs.m_strFilter="Score=88";
	rs.Open();
	while(!rs.IsEOF())
	{
		strTemp.Format("ID:%s  Name:%s  Score:%d",rs.m_ID,rs.m_Name,rs.m_Score);
		rs.MoveNext();
		dc.TextOut(300,y,strTemp);
		y+=30;
	}
	rs.Close();
*/

//删除1 用数据库删除（效率更高）
/*	CDatabase db;
	CStudentRecordSet rs(&db);
	CString strSql="delete from studenttable";
	rs.Open();
	db.ExecuteSQL(strSql);
*/
//删除2 一个一个删除
/*	CStudentRecordSet rs;
	rs.Open();
	while(!rs.IsEOF())
	{
		rs.Delete();
        rs.MoveNext();
	}
	rs.Close();
*/	
}

void CMyView::OnRButtonDown(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
//点击右键递减
/*	CMyDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	pDoc->m-=1;
	//str.Format("%d",m);
	this->Invalidate();//刷新
*/

	CStudentRecordSet rs;
	rs.Open();
	int y=20;
	CString str;
	CClientDC dc(this);
	while(!rs.IsEOF())//如果不是文件尾，继续向下输出
	{
		str.Format("ID:%s  Name:%s  Score:%d",rs.m_ID,rs.m_Name,rs.m_Score);
		rs.MoveNext();//向下移动一位
		dc.TextOut(20,y,str);
		y+=30;
	}
	rs.Close();

	CView::OnRButtonDown(nFlags, point);
}


void CMyView::OnMenuitem32771() 
{
	// TODO: Add your command handler code here
/*//弹出对话框
	MessageBox("success");
*/
//1.直接绑定值类型，触发ondraw
	Cmydialog2 md;

	if(md.DoModal()==IDOK)//domodal的返回值只有IDOK和IDCANCEL
	{
		strTemp=md.m_strName+" "+md.m_strID+" "+md.m_strScore;//用临时变量承载三个属性，再用strTemp触发OnDraw函数
		Invalidate();
	}

	
}