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();
}

}