adotestdlg.cpp

VC代码,ADO的SQL server数据库连接,查询基本功能示范

// ADOTestDlg.cpp : implementation file
//

#include "stdafx.h"
#include "ADOTest.h"
#include "ADOTestDlg.h"
#include "DbOperater.h"

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

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About
char strServer[MAX_SERVER_NAME];
char strUID[MAX_USER_NAME];
char strPWD[MAX_PASSWORD];
char strDBname[MAX_DATABASE_NAME];

_ConnectionPtr pADOConn;//ADO连接类
long retADOConn=-1;//ADO连接返回

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)
	//}}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_Control(pDX, IDC_BUTTON_QUERY, m_QueryCntrl);
	DDX_Control(pDX, IDC_EDIT_QUERY_RESULT, m_QueryResultCntrl);
	DDX_Control(pDX, IDC_EDIT_QUERY_SENTENCE, m_QuerySentenceCntrl);
	DDX_Control(pDX, IDC_BUTTON_DISCONNECT, m_DisConnectCntrl);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CADOTestDlg, CDialog)
	//{{AFX_MSG_MAP(CADOTestDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON_CONNECT, OnButtonConnect)
	ON_BN_CLICKED(IDC_BUTTON_DISCONNECT, OnButtonDisconnect)
	ON_WM_DESTROY()
	ON_BN_CLICKED(IDC_BUTTON_QUERY, OnButtonQuery)
	ON_EN_CHANGE(IDC_EDIT_QUERY_SENTENCE, OnChangeEditQuerySentence)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CADOTestDlg message handlers

BOOL CADOTestDlg::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
	//初始化数据库连接信息
	SetDlgItemText(IDC_EDIT_ADDRESS,"192.168.1.28");
	SetDlgItemText(IDC_EDIT_USER,"sa");
	SetDlgItemText(IDC_EDIT_PWD,"");
	SetDlgItemText(IDC_EDIT_DATABASE,"NorthWind");
	//初始化数据库连接状态
	bDBConnected = FALSE;
	//初始化OLE
	AfxOleInit();


	
	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::OnButtonConnect() 
{
	// TODO: Add your control notification handler code here
	GetDlgItemText(IDC_EDIT_ADDRESS,Server);
	GetDlgItemText(IDC_EDIT_USER,UID);
	GetDlgItemText(IDC_EDIT_PWD,PWD);
	GetDlgItemText(IDC_EDIT_DATABASE,DBname);

	//把输入的数据库连接信息保存在全局变量中
	strcpy(strServer,(LPCTSTR)Server);
	strcpy(strUID,(LPCTSTR)UID);
	strcpy(strPWD,(LPCTSTR)PWD);
	strcpy(strDBname,(LPCTSTR)DBname);


	CString strInfo;
	strInfo.Format("Server:%s;User:%S;PSW:%s;Database:%s",
					Server,UID,PWD,DBname);

	CEdit* pInfo;

	pInfo = (CEdit*)GetDlgItem(IDC_EDIT_INFO);

	if(InitDb()==0)
	{
		bDBConnected = TRUE;
		m_DisConnectCntrl.EnableWindow(TRUE);
		strInfo = strInfo+"\r\n数据库连接成功";
		pInfo->SetWindowText(strInfo);
		m_QuerySentenceCntrl.SetWindowText("select * from Categories");

	}
	else
	{
		bDBConnected = FALSE;
		strInfo = strInfo+"\r\n数据库连接失败";
		pInfo->SetWindowText(strInfo);
	}

}

void CADOTestDlg::OnButtonDisconnect() 
{
	// TODO: Add your control notification handler code here
	if(bDBConnected)
	{
		bDBConnected = FALSE;
		FreeDb();
		m_DisConnectCntrl.EnableWindow(FALSE);
		m_QueryCntrl.EnableWindow(FALSE);
		
		CString strInfo;
		strInfo.Format("Server:%s;User:%S;PSW:%s;Database:%s",
					Server,UID,PWD,DBname);
		strInfo += "\r\n数据库连接被断开";

		CEdit* pInfo;
		pInfo = (CEdit*)GetDlgItem(IDC_EDIT_INFO);
		pInfo->SetWindowText(strInfo);


	}
	
}

void CADOTestDlg::OnDestroy() 
{
	if(bDBConnected)
	{
		bDBConnected = FALSE;
		m_DisConnectCntrl.EnableWindow(FALSE);
		m_QueryCntrl.EnableWindow(FALSE);
		FreeDb();
	}

	CDialog::OnDestroy();	
}

void CADOTestDlg::OnButtonQuery() 
{
	// TODO: Add your control notification handler code here
	//设置操作数据库的字符串
	_RecordsetPtr    pRecordset;
	char SQLstrTemp[500];
	char * pSqlstr=SQLstrTemp;

	memset(pSqlstr,0x00,500);
	CString strSQL;
	m_QuerySentenceCntrl.GetWindowText(strSQL);
	strcpy(pSqlstr,(LPCTSTR)strSQL);

	try
	{
		HRESULT hr;
		pRecordset.CreateInstance(__uuidof(Recordset));
		pRecordset->Open(pSqlstr,
							_variant_t((IDispatch*)pADOConn),
							adOpenStatic,
							adLockOptimistic,
							adCmdFile);
		CComVariant vField;
		CComVariant vName;
		FieldsPtr pFields;
		FieldPtr pField;
		CString strStationID;
		CString strResult;
		 _variant_t vColumn;
		strResult="选中结果如下：\r\n";
		while(!pRecordset->adoEOF)
		{
			hr =  pRecordset->get_Fields(&pFields);
			long lCount;
			short j;
			DataTypeEnum DataType;
			pFields->get_Count(&lCount);
			for(j=0;j<lCount;j++)
			{
				vColumn = (short)j;
				hr = pFields->get_Item(vColumn, &pField) ;	
				pField->get_Type(&DataType);
				switch(DataType)
				{
					case adTinyInt:
					case adSmallInt:
					case adInteger:
					case adBigInt:
					case adUnsignedTinyInt:
					case adUnsignedSmallInt:
					case adUnsignedInt :
					case adUnsignedBigInt:
						hr = pField->get_Value (&vName) ;
						long nTemp;
						nTemp = vName.bVal;
						strStationID.Format("%d",nTemp);
						break;
					case adBSTR:
					case adChar :
					case adVarChar:
					case adLongVarChar :
					case adWChar :
					case adVarWChar :
					case adLongVarWChar :
						hr = pField->get_Value (&vName) ;
						strStationID=vName.bstrVal;
//						strStationID.Format("%14s",strStationID);
						break;
					default:
						strStationID="未考虑此类型数据的处理!";
						break;
				}
//				vField = "CategoryName";
//				hr = pFields->get_Item(vField, &pField) ;				
				strResult += strStationID;
				strResult += "\t\t";
			}
			strResult += "\r\n";
			pRecordset->MoveNext();
		}
		m_QueryResultCntrl.SetWindowText(strResult);
    
		pRecordset->Close();
		pRecordset = NULL;

	}
	catch(...)
	{
		if(pRecordset->State != adStateClosed)
		{
			pRecordset->Close();
		}
		pRecordset = NULL;
		AfxMessageBox("查询出错，请检查查询语句的正确性");
		return;
	}
	
}

void CADOTestDlg::OnChangeEditQuerySentence() 
{
	// TODO: If this is a RICHEDIT control, the control will not
	// send this notification unless you override the CDialog::OnInitDialog()
	// function and call CRichEditCtrl().SetEventMask()
	// with the ENM_CHANGE flag ORed into the mask.
	
	// TODO: Add your control notification handler code here
	if(bDBConnected)
	{

		if(m_QuerySentenceCntrl.GetWindowTextLength()>0)
		{
			m_QueryCntrl.EnableWindow(TRUE);
		}	
		else 
		{
			m_QueryCntrl.EnableWindow(FALSE);
		}
		m_QueryResultCntrl.SetWindowText("");
	}
	else
	{
		AfxMessageBox("数据库未连接，请连接数据库！");
	}
	
	
}