adotestdlg.cpp

轻松实现数据库ADO连接

// AdoTestDlg.cpp : implementation file
//

#include "stdafx.h"
#include "AdoTest.h"
#include "AdoTestDlg.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()

/////////////////////////////////////////////////////////////////////////////
// CAdoTestDlg dialog

CAdoTestDlg::CAdoTestDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CAdoTestDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CAdoTestDlg)
	m_name = _T("");
	m_show = _T("");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CAdoTestDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CAdoTestDlg)
	DDX_Text(pDX, IDC_name, m_name);
	DDX_Text(pDX, IDC_show, m_show);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CAdoTestDlg, CDialog)
	//{{AFX_MSG_MAP(CAdoTestDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDchange, Onchange)
	ON_BN_CLICKED(IDdelet, Ondelet)
	ON_BN_CLICKED(IDfind, Onfind)
	ON_BN_CLICKED(IDC_Showed, OnShowed)
	ON_BN_CLICKED(IDC_first, Onfirst)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CAdoTestDlg message handlers

BOOL CAdoTestDlg::OnInitDialog()
{
	CDialog::OnInitDialog();
	try   
    {   
		HRESULT hr=m_pConnection.CreateInstance("ADODB.Connection");//创建Connection对象  
		m_pRecordset.CreateInstance("ADODB.Recordset");
		
		if(SUCCEEDED(hr))   
		{   
			hr=m_pConnection->Open("Provider=SQLOLEDB.1;Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=wynnew;Data Source=3093FA2FA8CC444","","",adConnectUnspecified);//连接数据库   
			//上面一句中连接字串中的Provider是针对ACCESS2000环境的，对于ACCESS97,需要改为:Provider=Microsoft.Jet.OLEDB.3.51;     }   
		    _variant_t   ra; 
			try
			{
             m_pRecordset->Open("SELECT * FROM   姓名",_variant_t((IDispatch*)m_pConnection,true),adOpenStatic,adLockOptimistic,adCmdText); 
			}
			catch (_com_error   e)
			{
			m_pConnection->Execute("CREATE   TABLE   姓名(name   TEXT)",&ra,adCmdText);
			m_pRecordset->Open("SELECT * FROM   姓名",_variant_t((IDispatch*)m_pConnection,true),adOpenStatic,adLockOptimistic,adCmdText); 
		}
		}  
    }   
    catch   (_com_error   e)   //COM错误取得,当执行COM功能的时候，如果出错，可以捕捉到_com_error的异常   
    {       
		CString   strComError;   
		strComError.Format("错误编号:   %08lx\n错误信息:   %s\n错误源:   %s\n错误描述:   %s",   
			e.Error(),                                     //   错误编号   
			e.ErrorMessage(),                       //   错误信息   
			(LPCSTR)   e.Source(),                 //   错误源   
			(LPCSTR)   e.Description());     //   错误描述               
        
		::MessageBox(NULL,strComError,"错误",MB_ICONEXCLAMATION);   
    }   


	// 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 CAdoTestDlg::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 CAdoTestDlg::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 CAdoTestDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CAdoTestDlg::OnOK() //向表中增加一条记录
{
	// TODO: Add extra validation here
	UpdateData(true);
	if (m_name=="")
	{
		MessageBox("输入不能为空！");
	}
    else
	{

	
	_variant_t   vname;     
	m_pRecordset->AddNew();         //添加新记录   
    m_pRecordset->PutCollect("name",_variant_t((m_name)));   
    m_pRecordset->Update(); 
	//m_pRecordset->Close(); 
    MessageBox("增加记录成功！");
}

	//CDialog::OnOK();
}

void CAdoTestDlg::Onchange() //在表中找到符合要求的字段并替换一条记录
{
	// TODO: Add your control notification handler code here
	UpdateData(true);
	if (m_name==""||m_show=="")
	{
		MessageBox("输入不能为空！");
	}
	else
	{
    _variant_t vname;
	CString changname;
    m_pRecordset->MoveFirst();
    while(!m_pRecordset->adoEOF) 
	{
   	changname=m_pRecordset->GetCollect("name").bstrVal; 
	if (m_name==changname)
	{
	m_pRecordset->Delete(adAffectCurrent); //删除当前记录 
	m_pRecordset->Update(); 
	m_pRecordset->AddNew();         //添加新记录   
    m_pRecordset->PutCollect("name",_variant_t((m_show)));  
	m_pRecordset->Update(); 
    }

    m_pRecordset->MoveNext();  
	}
	//m_pRecordset->Close();
	MessageBox("替换成功！");
	}
	}
void CAdoTestDlg::Ondelet() //删除表中的一条记录
{
	// TODO: Add your control notification handler code here
	UpdateData(); 
	CString changname;
	if (m_name=="")
	{
		MessageBox("输入不能为空！");
	}
	else
	{
    m_pRecordset->MoveFirst();         //移到首条记录   
	while(!m_pRecordset->adoEOF) 
	{
		changname=m_pRecordset->GetCollect("name").bstrVal; 
		if (m_name==changname)
		{
			m_pRecordset->Delete(adAffectCurrent); //删除当前记录 
		}
		m_pRecordset->MoveNext();  
	}
	//m_pRecordset->Close();
	//m_pRecordset->Delete(adAffectCurrent); //删除当前记录 
	//m_pRecordset->Update(); 
	//m_pRecordset->Close(); 
    MessageBox("删除成功！");
}
}
void CAdoTestDlg::Onfind() //查找表中的记录
{
	// TODO: Add your control notification handler code here
	
}

void CAdoTestDlg::OnShowed() //显示表中对应字段的记录值
{
	// TODO: Add your control notification handler code here 
	_variant_t vshowname;  
     //vID   =   m_pRecordset->GetCollect(_variant_t((long)0));         //取得第1列的值,从0开始计数，你也可以直接给出列的名称，如下一行 
	 while (!m_pRecordset->adoEOF)
	   {
		
		m_show=m_pRecordset->GetCollect("name").bstrVal;  //取得姓名字段的值   
        
		//m_pRecordset->Update();
	    break;
	   }
	   
	   if (m_pRecordset->adoEOF)
	   {
		   MessageBox("显示结束！");
	   }
	   if (!m_pRecordset->adoEOF)
	   {
		   m_pRecordset->MoveNext();
	   }
	   
	   UpdateData(false);
}

void CAdoTestDlg::Onfirst() 
{
	// TODO: Add your control notification handler code here
	m_pRecordset->MoveFirst(); 
    m_show=m_pRecordset->GetCollect("name").bstrVal;
	UpdateData(false);
}