ociexampledlg.cpp

这是书上的代码

// OCIExampleDlg.cpp : implementation file
//

#include "stdafx.h"
#include "OCIExample.h"
#include "OCIExampleDlg.h"

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

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// Dialog Data
	//{{AFX_DATA(CAboutDlg)
	enum { IDD = IDD_ABOUTBOX };
	//}}AFX_DATA

	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CAboutDlg)
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
	//}}AFX_VIRTUAL

// Implementation
protected:
	//{{AFX_MSG(CAboutDlg)
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
	//{{AFX_DATA_INIT(CAboutDlg)
	//}}AFX_DATA_INIT
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CAboutDlg)
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
	//{{AFX_MSG_MAP(CAboutDlg)
		// No message handlers
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// COCIExampleDlg dialog

COCIExampleDlg::COCIExampleDlg(CWnd* pParent /*=NULL*/)
	: CDialog(COCIExampleDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(COCIExampleDlg)
	m_strTablename = _T("");
	m_strFieldName = _T("");
	m_strcondition = _T("");
	m_strFieldVal = _T("");
	m_strConFName = _T("");
	m_strConFVal = _T("");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	//可以改变程序的图标
	m_hIcon = AfxGetApp()->LoadIcon(IDR_ICON1);
	//初始化服务器句柄为空
	srvhp=NULL;
	//
	InsertDlg=NULL;
	//
	ColumnNumbers=0;
	//
	IsSizeInsertDlg=0;
}

void COCIExampleDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(COCIExampleDlg)
	DDX_Control(pDX, IDC_CO_CONFNAME, m_comConFNameCtrl);
	DDX_Control(pDX, IDC_COBFNAME, m_comboCtrl);
	DDX_Control(pDX, IDC_LIST_TABLEDATA, m_listCtrl);
	DDX_Control(pDX, IDC_LIST_TABLENAME, m_listTablename);
	DDX_LBString(pDX, IDC_LIST_TABLENAME, m_strTablename);
	DDX_CBString(pDX, IDC_COBFNAME, m_strFieldName);
	DDX_CBString(pDX, IDC_COMB_CONDITION, m_strcondition);
	DDX_Text(pDX, IDC_EFFIELDVAL, m_strFieldVal);
	DDX_CBString(pDX, IDC_CO_CONFNAME, m_strConFName);
	DDX_Text(pDX, IDC_E_CONFVAL, m_strConFVal);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(COCIExampleDlg, CDialog)
	//{{AFX_MSG_MAP(COCIExampleDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUT_CONNECTDB, OnButConnectdb)
	ON_BN_CLICKED(IDC_B_TABLESELECTOK, OnBTableselectok)
	ON_BN_CLICKED(IDC_BUT_QUERY, OnButQuery)
	ON_BN_CLICKED(IDC_BUT_DELETE, OnButDelete)
	ON_BN_CLICKED(IDC_BUT_UPDATE, OnButUpdate)
	ON_BN_CLICKED(IDC_BUT_INSERT, OnButInsert)
	ON_WM_SIZE()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// COCIExampleDlg message handlers

BOOL COCIExampleDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	
	// TODO: Add extra initialization here
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void COCIExampleDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void COCIExampleDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR COCIExampleDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void COCIExampleDlg::OnButConnectdb() 
{
	//OCIInitialize((ub4) OCI_DEFAULT,(dvoid *)0,(dvoid * (*)(dvoid *, size_t)) 0,
		//(dvoid * (*)(dvoid *, dvoid *, size_t)) 0,(void (*)(dvoid *, dvoid *)) 0 );
	/*
	OCIInitialize(OCI_OBJECT,(dvoid *)0,
                       (dvoid * (*)(dvoid *, size_t)) 0,
                       (dvoid * (*)(dvoid *, dvoid *, size_t)) 0,
                       (void (*)(dvoid *, dvoid *)) 0 );
					   */
	//ub4 mode = OCI_SHARED | OCI_THREADED;
	//代码4.1.2
	//Initializes the OCI process environment
    OCIInitialize (OCI_OBJECT, 0, 0, 0, 0);
	//初始化OCI环境
	OCIEnvInit(&envhp,OCI_DEFAULT,0,0 );
    //代码4.2.1:
	//分配句柄与数据结构
	//分配错误句柄
	OCIHandleAlloc(envhp,(void **)&errhp,OCI_HTYPE_ERROR,0,0);
    //分配服务器句柄
	OCIHandleAlloc(envhp,(void **)&srvhp,OCI_HTYPE_SERVER,0,0);
    //分配服务环境句柄
	OCIHandleAlloc(envhp,(void **)&svchp,OCI_HTYPE_SVCCTX,0,0);
	//分配会话句柄
	OCIHandleAlloc(envhp,(void **)&authp,OCI_HTYPE_SESSION,0,0);
	// allocate describe handle
    //分配描述句柄
    OCIHandleAlloc(envhp,(dvoid **) &dschp,OCI_HTYPE_DESCRIBE,0,0);
	//分配语句句柄
    ErrorProc(errhp,OCIHandleAlloc((dvoid *) envhp,(dvoid **) &stmthp,OCI_HTYPE_STMT,0,0));
	//代码4.3.1
	//产生接收用户数据的对话框
	CConectDlg  ConnDlg;
    ConnDlg.m_strDBName="imagedb";
    ConnDlg.m_strUserName="scott";
	ConnDlg.m_strUserID="tiger";
	if(ConnDlg.DoModal()==IDCANCEL)
		return;

	//代码4.3.2
	// 连接数据库
	UpdateData(TRUE);sword status;
    status=OCIServerAttach(srvhp,errhp,
		(unsigned char *)(LPCTSTR)ConnDlg.m_strDBName, 
		 (sb4)strlen(ConnDlg.m_strDBName),OCI_DEFAULT);
    // 设置数据库的属性：服务器环境
    ErrorProc(errhp,OCIAttrSet((dvoid *) svchp, 
                        (ub4) OCI_HTYPE_SVCCTX,
                      (dvoid *) srvhp, (ub4) 0, 
                      OCI_ATTR_SERVER, errhp));
	//代码4.3.3，认证用户并且开始会话
	LPCTSTR uid, pwd;
    uid=ConnDlg.m_strUserName;
    pwd=ConnDlg.m_strUserID;
	//认证用户名称;
    ErrorProc(errhp,OCIAttrSet(authp, 
	    OCI_HTYPE_SESSION, (dvoid *)uid, 
	  (ub4)strlen(uid),OCI_ATTR_USERNAME,errhp));	
    //认证用户密码
   ErrorProc(errhp,OCIAttrSet(authp, 
	     OCI_HTYPE_SESSION, (dvoid *)pwd, 
	     (ub4)strlen(pwd), OCI_ATTR_PASSWORD,errhp));	
    //以申明的用户名称与密码开始会话 
   status=OCISessionBegin(svchp, errhp,
	  authp,OCI_CRED_RDBMS,OCI_DEFAULT);                            
    if(status!=0)
		return ;
	// set the Service context
    status=OCIAttrSet(svchp, (ub4)OCI_HTYPE_SVCCTX, 
	     (dvoid *)authp,0,OCI_ATTR_SESSION,errhp);		
     if(status!=0)
		 return;
	
	//代码4.4.2
	//处理SQL的第一步，准备SQL
	//CString strSQL="SELECT TABLE_NAME FROM USER_TABLES";
	text textSQL[1024];
	wsprintf((char*)textSQL,"%s","SELECT TABLE_NAME FROM USER_TABLES");
	status=OCIStmtPrepare(stmthp,errhp,textSQL,
		strlen((char *)textSQL),OCI_NTV_SYNTAX,OCI_DEFAULT);
	//代码4.4.3
	//处理SQL的第三步，执行
	status=OCIStmtExecute(svchp,stmthp,errhp,0,0,NULL,NULL,OCI_DEFAULT);

    //代码4.4.4
    //处理SQL的第四步，描述
    ub4 col_num;//存放SELECT语句选中的列数
	//ub4 k=1;
	//读取选择列表中的项数
	ErrorProc(errhp,OCIAttrGet(stmthp,OCI_HTYPE_STMT,&col_num,0,
		OCI_ATTR_PARAM_COUNT,errhp));
    //为选择项分配参数描述符
    ErrorProc(errhp,OCIParamGet(stmthp,OCI_HTYPE_STMT,errhp,(void **)&colhp,
			1));
    //读取选择项的数据长度
	ErrorProc(errhp,OCIAttrGet(colhp,OCI_DTYPE_PARAM,&collen[0],0,
		OCI_ATTR_DATA_SIZE,errhp));
    //读取选择项的数据类型
	ErrorProc(errhp,OCIAttrGet(colhp,OCI_DTYPE_PARAM,&coltype[0],0,
		OCI_ATTR_DATA_TYPE,errhp));
	//分配缓冲区
	colbuf[0]=(text *)new text[(int)collen[0]+1];
    
	//代码4.4.5
	//处理SQL的第五步，定义变量
	status=OCIDefineByPos(stmthp,&defhp[0],errhp,1,(ub1*)colbuf[0],
		collen[0]+1,SQLT_STR,&ind[0],0,0,OCI_DEFAULT);


	//代码4.4.6
    //处理SQL的第六步，取值
	while((OCIStmtFetch(stmthp,errhp,1,OCI_FETCH_NEXT,OCI_DEFAULT))!=OCI_NO_DATA)
	{
		//CString pass=colbuf[0];
        //if(pass.Find('$')==-1)
		//把获取的用户的基表的名称加到ListBox控件中
		m_listTablename.AddString((char *)colbuf[0]);
	}
	//删除所分配的缓冲区
    delete  colbuf[0];
	//使得选择表的按钮可用
	GetDlgItem(IDC_B_TABLESELECTOK )->EnableWindow(true);
}

BOOL COCIExampleDlg::DestroyWindow() 
{
	// TODO: Add your specialized code here and/or call the base class
  if(srvhp!=NULL)
  {
  //代码4.5.1
  //结束会话
  OCISessionEnd(svchp, errhp, authp, (ub4) 0);
  //断开与数据库的连接
  OCIServerDetach(srvhp, errhp, OCI_DEFAULT);
  //释放OCI句柄 
  OCIHandleFree((dvoid *) srvhp,  OCI_HTYPE_SERVER);
  OCIHandleFree((dvoid *) svchp,  OCI_HTYPE_SVCCTX);
  OCIHandleFree((dvoid *) errhp,  OCI_HTYPE_ERROR);
  OCIHandleFree((dvoid *) authp,  OCI_HTYPE_SESSION);
  OCIHandleFree((dvoid *) stmthp, OCI_HTYPE_STMT);
  OCIHandleFree((dvoid *) dschp,  OCI_HTYPE_DESCRIBE);
  }
	return CDialog::DestroyWindow();
}

void COCIExampleDlg::ErrorProc(dvoid *err, sword status)
{
	text errbuf[512];
	sb4  errcode;
	CString str;
	switch(status)
	{
	case OCI_SUCCESS:
		break;
	case OCI_SUCCESS_WITH_INFO:
		(void) AfxMessageBox("OCI错误代码:OCI_SUCCESS_WITH_INFO\n");
		break;
	case OCI_NEED_DATA:
		(void) AfxMessageBox("OCI错误代码:OCI_NEED_DATA\n");
		break;
	case OCI_NO_DATA:
		(void) AfxMessageBox("OCI错误代码:OCI_NO_DATA\n");
		break;
	case OCI_ERROR:
		(void)OCIErrorGet((dvoid *)errhp,(ub4)1,NULL,&errcode,
			errbuf,(ub4)sizeof(errbuf),OCI_HTYPE_ERROR);
		str.Format("错误号:%d\n错误信息:%s\n",errcode,errbuf);
		AfxMessageBox(str);
		break;
	case OCI_INVALID_HANDLE:
		(void) AfxMessageBox("OCI错误代码:OCI_INVALID_HANDLE\n");
		break;
	case OCI_STILL_EXECUTING:
		(void) AfxMessageBox("OCI错误代码:OCI_STILL_EXECUTE\n");
		break;
	default:
		break;
	}

}
//代码4.1.3，OCI错误报告函数
/*
ErrorProc(dvoid *err, sword status)
{
		
	CString str;sb4  errcode;text errbuf[512];
	if(status==OCI_ERROR)
	{
	//调用OCI的错误获取函数
	OCIErrorGet((dvoid *)errhp,(ub4)1,NULL,&errcode,
			errbuf,(ub4)sizeof(errbuf),OCI_HTYPE_ERROR);
	str.Format("错误号:%d\n错误信息:%s\n",errcode,errbuf);
	AfxMessageBox(str);
	}
}


*/

COCIExampleDlg::~COCIExampleDlg()
{
	if(InsertDlg!=NULL)
      delete InsertDlg;
}

void COCIExampleDlg::OnBTableselectok() 
{
	// TODO: Add your control notification handler code here
	//代码5.1,
    //获取控件2所选中的表名
	TableName="";
    int item=m_listTablename.GetCurSel();
    m_listTablename.GetText(item,TableName);