mysqltestdlg.cpp

Mysql与VC.NET连接,实现功能: 添加删除修改,注:检索功能未实现,感兴趣的朋友可以研究一下, 仅供学习参考用!

// MysqlTestDlg.cpp : 实现文件
//

#include "stdafx.h"
#include "MysqlTest.h"
#include "MysqlTestDlg.h"
#include ".\mysqltestdlg.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 CDialog
{
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() : CDialog(CAboutDlg::IDD)
{
}

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

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
END_MESSAGE_MAP()


// CMysqlTestDlg 对话框



CMysqlTestDlg::CMysqlTestDlg(CWnd* pParent /*=NULL*/)
: CDialog(CMysqlTestDlg::IDD, pParent)
, m_nIndex(0)
, str_PreName(_T(""))
{
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CMysqlTestDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	DDX_Control(pDX, IDC_LIST, m_list);
}

BEGIN_MESSAGE_MAP(CMysqlTestDlg, CDialog)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	//}}AFX_MSG_MAP
	ON_BN_CLICKED(IDC_BUTTON_ADD, OnBnClickedButtonAdd)
	ON_BN_CLICKED(IDC_BUTTON_REP, OnBnClickedButtonRep)
	ON_BN_CLICKED(IDC_BUTTON_SEARCH, OnBnClickedButtonSearch)
	ON_NOTIFY(NM_CLICK, IDC_LIST, OnNMClickList)
	ON_WM_DESTROY()
	ON_BN_CLICKED(IDC_BUTTONDELETE, OnBnClickedButtondelete)
END_MESSAGE_MAP()


// CMysqlTestDlg 消息处理程序

BOOL CMysqlTestDlg::OnInitDialog()
{
	CDialog::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)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		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

	m_list.InsertColumn(0,"用户名",LVCFMT_CENTER,180);
	m_list.InsertColumn(1,"密  码",LVCFMT_CENTER,154);
	m_list.SetExtendedStyle(LVS_EX_FULLROWSELECT |LVS_EX_GRIDLINES);

	// TODO: Add extra initialization here
	mysql_init (&mysql);
	if(!mysql_real_connect(&mysql,"localhost","root",NULL,"vip",3306,NULL,0))
	{ 
		AfxMessageBox("数据库连接失败"); 
		return FALSE;
	}

	RefreshList();

	return TRUE;  // 除非设置了控件的焦点，否则返回 TRUE
}

void CMysqlTestDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::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 CMysqlTestDlg::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
	{
		CDialog::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 CMysqlTestDlg::OnQueryDragIcon()
{
	return static_cast<HCURSOR>(m_hIcon);
}

void CMysqlTestDlg::OnBnClickedButtonAdd()
{
	UpdateData();
	CString strUsername,strList;

	GetDlgItem(IDC_EDIT_USERNAME)->GetWindowText(strUsername);
	GetDlgItem(IDC_EDIT_VISITELIST)->GetWindowText(strList);

	CString strSQL;
	strSQL.Format("insert into login(username, password) values(\'%s\',\'%s\')", strUsername, strList);

	if(mysql_real_query(&mysql,(char*)(LPCTSTR)strSQL,(UINT)strSQL.GetLength())!=0)
	{ 
		AfxMessageBox("添加失败"); 
	}

	RefreshList();
	AfxMessageBox("添加成功"); 
}

void CMysqlTestDlg::OnBnClickedButtonRep()
{
	UpdateData();
	CString strUsername, strList;

	GetDlgItem(IDC_EDIT_USERNAME)->GetWindowText(strUsername);
	GetDlgItem(IDC_EDIT_VISITELIST)->GetWindowText(strList);

	CString strSQL;
	strSQL.Format("update login set username=\'%s\', password=\'%s\' where username=\'%s\'",strUsername,strList, str_PreName);

	if(mysql_real_query(&mysql,(char*)(LPCTSTR)strSQL,(UINT)strSQL.GetLength())!=0)
	{ 
		AfxMessageBox("修改失败"); 
	}

	RefreshList();
	AfxMessageBox("修改成功"); 
}

void CMysqlTestDlg::OnBnClickedButtonSearch()
{
		
}

void CMysqlTestDlg::OnNMClickList(NMHDR *pNMHDR, LRESULT *pResult)
{
	POSITION pos=m_list.GetFirstSelectedItemPosition();
	if(pos!=NULL)
	{
		CString strUsername,strList;

		m_nIndex=m_list.GetNextSelectedItem(pos);
		str_PreName=m_list.GetItemText(m_nIndex,0);

		strUsername=m_list.GetItemText(m_nIndex,0);
		GetDlgItem(IDC_EDIT_USERNAME)->SetWindowText(strUsername);

		strList=m_list.GetItemText(m_nIndex,1);
		GetDlgItem(IDC_EDIT_VISITELIST)->SetWindowText(strList);		

		UpdateData(FALSE);

	}

	*pResult = 0;
}

void CMysqlTestDlg::OnDestroy()
{
	CDialog::OnDestroy();

	mysql_close(&mysql);
}

void CMysqlTestDlg::RefreshList(void)
{
	m_list.DeleteAllItems();

	//////////////////////////////////////////////////////////////////////////
	char *ch_query;
	ch_query="select * from login";

	if(mysql_real_query(&mysql,ch_query,(UINT)strlen(ch_query))!=0)
	{ 
		AfxMessageBox("数据库中表格出错"); 
	}

	CString str;
	MYSQL_RES *result;
	MYSQL_ROW row;

	if(!(result=mysql_use_result(&mysql)))
	{ 
		AfxMessageBox("读取数据集失败"); 		
	}

	int i=0;
	while(row=mysql_fetch_row(result))
	{
		str.Format("%s",row[0]);
		m_list.InsertItem(i,str);

		str.Format("%s",row[1]);
		m_list.SetItemText(i,1,str);	

		i++;
	}

	mysql_free_result(result);
}

void CMysqlTestDlg::OnBnClickedButtondelete()
{
	UpdateData();

	AfxMessageBox("确定删除");

	CString strSQL;
	strSQL.Format("delete from login where username=\'%s\'", str_PreName);
	if(mysql_real_query(&mysql,(char*)(LPCTSTR)strSQL,(UINT)strSQL.GetLength())!=0)
	{ 
		AfxMessageBox("删除失败"); 
	}

	for(POSITION pos=m_list.GetFirstSelectedItemPosition();pos!=NULL;)
	{
		int nIndex=m_list.GetNextSelectedItem(pos);
	}

	RefreshList();
}