使用MFC类CDatabase、recordset实现查询数据库

一、软件界面

二、源码

// demoDlg.cpp : 实现文件
//

#include "stdafx.h"
#include "demo.h"
#include "demoDlg.h"
#include "afxdialogex.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif

// 用于应用程序“关于”菜单项的 CAboutDlg 对话框

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

// 对话框数据
enum { IDD = IDD_ABOUTBOX };

protected:
virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV 支持

// 实现
protected:
DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialogEx(CAboutDlg::IDD)
{
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
CDialogEx::DoDataExchange(pDX);
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialogEx)
END_MESSAGE_MAP()

// CdemoDlg 对话框

CdemoDlg::CdemoDlg(CWnd* pParent /*=NULL*/)
: CDialogEx(CdemoDlg::IDD, pParent)
{
m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CdemoDlg::DoDataExchange(CDataExchange* pDX)
{
   CDialogEx::DoDataExchange(pDX);
   DDX_Control(pDX, IDC_LIST1, m_list1);
   DDX_Control(pDX, IDC_LIST2, m_list2);
}

BEGIN_MESSAGE_MAP(CdemoDlg, CDialogEx)
   ON_WM_SYSCOMMAND()
   ON_WM_PAINT()
   ON_WM_QUERYDRAGICON()
   ON_BN_CLICKED(IDC_BTN_LONGIN, &CdemoDlg::OnBnClickedBtnLongin)
   ON_BN_CLICKED(IDC_BTN_TEST, &CdemoDlg::OnBnClickedBtnTest)
END_MESSAGE_MAP()

// CdemoDlg 消息处理程序

BOOL CdemoDlg::OnInitDialog()
{
CDialogEx::OnInitDialog();

// 将“关于...”菜单项添加到系统菜单中。

   // IDM_ABOUTBOX 必须在系统命令范围内。
   ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
   ASSERT(IDM_ABOUTBOX < 0xF000);

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

   // 设置此对话框的图标。当应用程序主窗口不是对话框时，框架将自动
   // 执行此操作
   SetIcon(m_hIcon, TRUE);           // 设置大图标
   SetIcon(m_hIcon, FALSE);       // 设置小图标

iniUI();

return TRUE; // 除非将焦点设置到控件，否则返回 TRUE
}

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

// 如果向对话框添加最小化按钮，则需要下面的代码
// 来绘制该图标。对于使用文档/视图模型的 MFC 应用程序，
// 这将由框架自动完成。

void CdemoDlg::OnPaint()
{
   if (IsIconic())
   {
       CPaintDC dc(this); // 用于绘制的设备上下文

SendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0);

       // 使图标在工作区矩形中居中
       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;

       // 绘制图标
       dc.DrawIcon(x, y, m_hIcon);
   }
   else
   {
       CDialogEx::OnPaint();
   }
}

//当用户拖动最小化窗口时系统调用此函数取得光标
//显示。
HCURSOR CdemoDlg::OnQueryDragIcon()
{
return static_cast<HCURSOR>(m_hIcon);
}

#define SS_DEBUG

void CdemoDlg::iniUI()
{
   #ifdef SS_DEBUG
   SetDlgItemText(IDC_EDIT_SETVERIP, L"192.168.0.145");
   SetDlgItemText(IDC_EDIT_DATABASE, L"LeiMan");
   SetDlgItemText(IDC_EDIT_PORT, L"1433");
   SetDlgItemText(IDC_EDIT_USERID, L"sc");
   SetDlgItemText(IDC_EDIT_PWD, L"000000");
   SetDlgItemText(IDC_EDIT_ODER, L"固晶");
   SetDlgItemText(IDC_EDIT_BARCODE, L"692345065");
   #else
   SetDlgItemText(IDC_EDIT_SETVERIP, L"192.168.1.10");
   SetDlgItemText(IDC_EDIT_DATABASE, L"lmgd");
   SetDlgItemText(IDC_EDIT_PORT, L"1433");
   SetDlgItemText(IDC_EDIT_USERID, L"LJ");
   SetDlgItemText(IDC_EDIT_PWD, L"lm2019");
   SetDlgItemText(IDC_EDIT_ODER, L"固晶");
   SetDlgItemText(IDC_EDIT_BARCODE, L"");
   #endif

SetDlgItemText(IDC_EDIT_TIME1, L"0秒");
SetDlgItemText(IDC_EDIT_TIME2, L"0秒");

((CButton*)GetDlgItem(IDC_BTN_TEST))->EnableWindow(FALSE);
}

void CdemoDlg::OnBnClickedBtnLongin()
{
if (m_database.IsOpen()) m_database.Close();

   CString sIP;
   CString sDatabase;
   CString sPort;
   CString sUserID;
   CString sPwd;
   GetDlgItemText(IDC_EDIT_SETVERIP, sIP);
   GetDlgItemText(IDC_EDIT_DATABASE, sDatabase);
   GetDlgItemText(IDC_EDIT_PORT, sPort);
   GetDlgItemText(IDC_EDIT_USERID, sUserID);
   GetDlgItemText(IDC_EDIT_PWD, sPwd);

CString sSql;
sSql.Format(L"DRIVER={SQL SERVER};SERVER=%s,%s;DATABASE=%s;UID=%s;PWD=%s", sIP, sPort, sDatabase, sUserID, sPwd);

   if(!m_database.OpenEx(sSql, CDatabase::noOdbcDialog))
   {
       AfxMessageBox(L"登录数据库失败,请检查用户名、密码是否正确");
       ((CButton*)GetDlgItem(IDC_BTN_TEST))->EnableWindow(FALSE);
   }
   else
   {
       AfxMessageBox(L"登录数据成功");
       ((CButton*)GetDlgItem(IDC_BTN_TEST))->EnableWindow(TRUE);
   }
}

void CdemoDlg::OnBnClickedBtnTest()
{
   if (!m_database.IsOpen())
   {
       AfxMessageBox(L"请先登录数据库");
       return;
   }

   //1. 获取测试工序和条码
   CString sOder;
   CString sBarCode;
   GetDlgItemText(IDC_EDIT_ODER, sOder);
   GetDlgItemText(IDC_EDIT_BARCODE, sBarCode);

   if (sOder.IsEmpty())
   {
       AfxMessageBox(L"测试工序不能为空");
       return;
   }

   if (sBarCode.IsEmpty())
   {
       AfxMessageBox(L"测试条码不能为空");
       return;
   }

test1(sOder, sBarCode);
test2(sOder, sBarCode);
}

void CdemoDlg::test1(CString &sOder, CString &sBarCode)
{
   int nColumnCount = m_list1.GetHeaderCtrl()->GetItemCount();
   for (int i = nColumnCount - 1; i >= 0; i--) m_list1.DeleteColumn(i);
   m_list1.DeleteAllItems();

   DWORD dwStyle = m_list1.GetExtendedStyle();
   dwStyle |= LVS_EX_GRIDLINES | LVS_EX_FULLROWSELECT | LVS_EX_DOUBLEBUFFER;
   m_list1.SetExtendedStyle(dwStyle);

   m_list1.InsertColumn(0, L"序号", LVCFMT_CENTER, 80);
   m_list1.InsertColumn(1, L"x坐标", LVCFMT_CENTER, 80);
   m_list1.InsertColumn(2, L"y坐标", LVCFMT_CENTER, 80);

   clock_t start = clock();

   #ifdef SS_DEBUG
   CString sSql;
   sSql.Format(L"SELECT TOP 1 操作时间 FROM COB WHERE 工序 = '%s' AND 条码号 = '%s'", sOder, sBarCode);

CRecordset recordset(&m_database);//绑定记录集
recordset.Open(CRecordset::none, sSql, CRecordset::none);//执行查询语句strSQL

   CString sTemp;
   recordset.GetFieldValue(_T("操作时间"), sTemp);
   recordset.Close();

   CString sSql2;
   sSql2.Format(L"SELECT x坐标, y坐标 FROM COB WHERE (工序 = '%s') AND (条码号 = '%s') AND 操作时间= '%s'", sOder, sBarCode, sTemp);
   #else
   CString sSql;
   sSql.Format(L"SELECT TOP 1 操作时间 FROM COB条码不良信息表_明细 WHERE 工序 = '%s' AND 条码号 = '%s'", sOder, sBarCode);

CRecordset recordset(&m_database);//绑定记录集
recordset.Open(CRecordset::none, sSql, CRecordset::none);//执行查询语句strSQL

   CString sTemp;
   recordset.GetFieldValue(_T("操作时间"), sTemp);
   recordset.Close();

   CString sSql2;
   sSql2.Format(L"SELECT x坐标, y坐标 FROM COB条码不良信息表_明细 WHERE (工序 = '%s') AND (条码号 = '%s') AND 操作时间= '%s'", sOder, sBarCode, sTemp);
   #endif

CRecordset recordset2(&m_database);//绑定记录集
recordset2.Open(CRecordset::none, sSql2, CRecordset::none);//执行查询语句strSQL

clock_t finish = clock();
float duration = (double)(finish - start) / CLOCKS_PER_SEC;

   CString sTime;
   sTime.Format(L"%.4f秒", duration);
   SetDlgItemText(IDC_EDIT_TIME1, sTime);

if(!recordset2.CanUpdate()) AfxMessageBox(L"查询数据失败");

   int iCount = 0;
   while(!recordset2.IsEOF())//判断是否到记录集末尾
   {
       char buf[1024] = {0};
       int iRow = m_list1.GetItemCount();
       int iIndex = m_list1.InsertItem(iRow, CString(itoa(iRow+1, buf, 10)));

       CString sPosX, sPosY;
       recordset2.GetFieldValue(_T("x坐标"), sPosX);
       recordset2.GetFieldValue(_T("y坐标"), sPosY);

m_list1.SetItemText(iIndex, 1, sPosX);
m_list1.SetItemText(iIndex, 2, sPosY);

recordset2.MoveNext();//移动到记录集的下一行

       iCount++;
       if (iCount > 5) break;
   }
   recordset2.Close();
}

void CdemoDlg::test2(CString &sOder, CString &sBarCode)
{
   int nColumnCount = m_list2.GetHeaderCtrl()->GetItemCount();
   for (int i = nColumnCount - 1; i >= 0; i--) m_list2.DeleteColumn(i);
   m_list2.DeleteAllItems();

   DWORD dwStyle = m_list2.GetExtendedStyle();
   dwStyle |= LVS_EX_GRIDLINES | LVS_EX_FULLROWSELECT | LVS_EX_DOUBLEBUFFER;
   m_list2.SetExtendedStyle(dwStyle);

   m_list2.InsertColumn(0, L"序号", LVCFMT_CENTER, 80);
   m_list2.InsertColumn(1, L"x坐标", LVCFMT_CENTER, 80);
   m_list2.InsertColumn(2, L"y坐标", LVCFMT_CENTER, 80);

   #ifdef SS_DEBUG
   CString sSql;
   sSql.Format(L"SELECT x坐标, y坐标 FROM COB WHERE (工序 = '%s') AND (条码号 = '%s') AND \
               操作时间=(SELECT TOP (1) 操作时间 FROM COB WHERE (工序 = '%s') AND (条码号 = '%s') order by 操作时间 desc)", sOder, sBarCode, sOder, sBarCode);
   #else
   CString sSql;
   sSql.Format(L"SELECT x坐标, y坐标 FROM COB条码不良信息表_明细 WHERE (工序 = '%s') AND (条码号 = '%s') AND \
               操作时间=(SELECT TOP (1) 操作时间 FROM COB条码不良信息表_明细 WHERE (工序 = '%s') AND (条码号 = '%s') order by 操作时间 desc)", sOder, sBarCode, sOder, sBarCode);
   #endif

   clock_t start = clock();

CRecordset recordset(&m_database);//绑定记录集
recordset.Open(CRecordset::none, sSql, CRecordset::none);//执行查询语句strSQL

clock_t finish = clock();
float duration = (double)(finish - start) / CLOCKS_PER_SEC;

   CString sTime;
   sTime.Format(L"%.4f秒", duration);
   SetDlgItemText(IDC_EDIT_TIME2, sTime);

if(!recordset.CanUpdate()) AfxMessageBox(L"查询数据失败");

   int iCount = 0;
   while(!recordset.IsEOF())//判断是否到记录集末尾
   {
       char buf[1024] = {0};
       int iRow = m_list2.GetItemCount();
       int iIndex = m_list2.InsertItem(iRow, CString(itoa(iRow+1, buf, 10)));

       CString sPosX, sPosY;
       recordset.GetFieldValue(_T("x坐标"), sPosX);
       recordset.GetFieldValue(_T("y坐标"), sPosY);

       m_list2.SetItemText(iIndex, 1, sPosX);
       m_list2.SetItemText(iIndex, 2, sPosY);

recordset.MoveNext();//移动到记录集的下一行

       iCount++;
       if (iCount > 5) break;
   }
   recordset.Close();
}

三、测试结果

来源：CSDN

作者：mark-puls

链接：https://blog.csdn.net/cwj066/article/details/104820791

标签

cstring

mfc