SNMP编程

开发平台：
C/C++

UserManagement.cpp：源码内容
							// UserManagement.cpp : implementation file
//
#include "stdafx.h"
#include "oam.h"
#include "UserManagement.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// CUserManagement dialog
extern COAMApp theApp;
CUserManagement::CUserManagement(CWnd* pParent /*=NULL*/)
	: CDialog(CUserManagement::IDD, pParent)
{
	//{{AFX_DATA_INIT(CUserManagement)
	m_password = _T("");
	m_passwordc = _T("");
	m_power = _T("");
	m_username = _T("");
	//}}AFX_DATA_INIT
}
void CUserManagement::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CUserManagement)
	DDX_Control(pDX, IDC_USERLIST, m_userlist);
	DDX_Control(pDX, IDC_DELITEM, m_cDelItem);
	DDX_Control(pDX, IDC_ADDITEM, m_cAddItem);
	DDX_Text(pDX, IDC_PASSWORD, m_password);
	DDX_Text(pDX, IDC_PASSWORDC, m_passwordc);
	DDX_Text(pDX, IDC_POWER, m_power);
	DDX_Text(pDX, IDC_USERNAME, m_username);
	//}}AFX_DATA_MAP
}
BEGIN_MESSAGE_MAP(CUserManagement, CDialog)
	//{{AFX_MSG_MAP(CUserManagement)
	ON_BN_CLICKED(IDC_ADDITEM, OnAdditem)
	ON_BN_CLICKED(IDC_DELITEM, OnDelitem)
	ON_NOTIFY(LVN_ITEMCHANGED, IDC_USERLIST, OnItemchangedUserlist)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CUserManagement message handlers
BOOL CUserManagement::OnInitDialog() 
{
	CDialog::OnInitDialog();
	
	m_cDelItem.EnableWindow(FALSE);
	::SendMessage(m_userlist.m_hWnd, LVM_SETEXTENDEDLISTVIEWSTYLE,LVS_EX_FULLROWSELECT, LVS_EX_FULLROWSELECT);
	//////////为列表控件添加列//////////
   m_userlist.InsertColumn(1,"用户ID",LVCFMT_LEFT,60);
	m_userlist.InsertColumn(1,"用户名",LVCFMT_LEFT,100);
	m_userlist.InsertColumn(2,"用户权限",LVCFMT_LEFT,60);
	//////////读取数据库中的信息添加到列表控件///////////
	int nItem;
	_variant_t vUsername,vID,vPower;
	try
	{
		m_pRecordset.CreateInstance("ADODB.Recordset");
		m_pRecordset->Open("SELECT * FROM users",_variant_t((IDispatch*)theApp.m_pConnection,true),adOpenStatic,adLockOptimistic,adCmdText);
		m_bSuccess = TRUE;
		while(!m_pRecordset->adoEOF)
		{
	
			vID = m_pRecordset->GetCollect("ID");
			vUsername = m_pRecordset->GetCollect("username");
			vPower = m_pRecordset->GetCollect("userpower");
	
			nItem=m_userlist.InsertItem(0xffff,(_bstr_t)vID);
			m_userlist.SetItem(nItem,1,1,(_bstr_t)vUsername,NULL,0,0,0);
			m_userlist.SetItem(nItem,2,1,(_bstr_t)vPower,NULL,0,0,0);
			
			m_pRecordset->MoveNext();
		}
	}
	catch(_com_error e)///捕捉异常
	{
		AfxMessageBox("读取数据库失败!");///显示错误信息
	}
	// Add "About..." menu item to system menu.
	// IDM_ABOUTBOX must be in the system command range.
	
	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	
	// TODO: Add extra initialization here
	
	
	return TRUE;  // return TRUE unless you set the focus to a control
	              // EXCEPTION: OCX Property Pages should return FALSE
}
void CUserManagement::LoadData()
{
	m_pRecordset->Move(m_nCurrentSel,_variant_t((long)adBookmarkFirst));
	vUserID = m_pRecordset->GetCollect("ID");
	vUsername = m_pRecordset->GetCollect("username");
	vPower = m_pRecordset->GetCollect("userpower");
    vPassword=m_pRecordset->GetCollect("password");
//	m_nUserID = vUserID.lVal;
	m_username = (LPCTSTR)(_bstr_t)vUsername;
	m_power = (LPCTSTR)(_bstr_t)vPower;
	m_password = (LPCTSTR)(_bstr_t)vPassword;
	m_passwordc = (LPCTSTR)(_bstr_t)vPassword;
	UpdateData(FALSE);
}
/////将编辑框的数据保存到记录集与列表框
void CUserManagement::SaveData()
{
	if(!m_pRecordset->adoEOF && m_nCurrentSel >= 0 && m_bAutoSave)
	{
	//	vUserID = (long)m_nUserID;
		vUsername = m_username;
		vPower = m_power;
		vPassword = m_password;
		//m_pRecordset->PutCollect("ID",vUserID);
		m_pRecordset->PutCollect("username",vUsername);
		m_pRecordset->PutCollect("userpower",vPower);
		m_pRecordset->PutCollect("password",vPassword);
	//	m_userlist.SetItem(m_nCurrentSel,0,LVIF_TEXT,(_bstr_t)vUserID,NULL,0,0,0);
		m_userlist.SetItem(m_nCurrentSel,1,LVIF_TEXT,(_bstr_t)vUsername,NULL,0,0,0);
		m_userlist.SetItem(m_nCurrentSel,2,LVIF_TEXT,(_bstr_t)vPower,NULL,0,0,0);
	//	m_userlist.SetItem(m_nCurrentSel,3,LVIF_TEXT,(_bstr_t)vBirthday,NULL,0,0,0);
	}
}
void CUserManagement::OnAdditem() 
{
	if(UpdateData())
	if(m_username.GetLength()>0)
	{
		m_pRecordset->AddNew();
		m_nCurrentSel = m_userlist.InsertItem(0xffff,"");
		SaveData();///保存数据
		m_userlist.SetItemState(m_nCurrentSel,LVIS_SELECTED|LVIS_FOCUSED,LVIS_SELECTED|LVIS_FOCUSED);
		m_userlist.SetHotItem(m_nCurrentSel);
		m_userlist.SetFocus();
	}
	else
		AfxMessageBox("请输入用户名");
	
}
void CUserManagement::OnDelitem() 
{
	// TODO: Add your control notification handler code here
		m_bAutoSave = FALSE;
	if(m_nCurrentSel >= 0)
	{
		m_userlist.DeleteItem(m_nCurrentSel);
		int count = m_userlist.GetItemCount();
		if(count <= m_nCurrentSel)
			m_nCurrentSel = count-1;
		m_pRecordset->Delete(adAffectCurrent);
		 
		m_pRecordset->MoveNext();
		if (!m_pRecordset->adoEOF)
        { 
		LoadData();
		m_userlist.SetItemState(m_nCurrentSel,LVIS_SELECTED|LVIS_FOCUSED,LVIS_SELECTED|LVIS_FOCUSED);
		m_userlist.SetFocus();
		}
		else
				m_cDelItem.EnableWindow(FALSE);;
	}
	m_bAutoSave = TRUE;
}
void CUserManagement::OnItemchangedUserlist(NMHDR* pNMHDR, LRESULT* pResult) 
{
	NM_LISTVIEW* pNMListView = (NM_LISTVIEW*)pNMHDR;
	if(pNMListView->uNewState&LVIS_SELECTED)
	{
	UpdateData();
	SaveData();///保存旧数据
	m_nCurrentSel = pNMListView->iItem;
	LoadData();///加载新数据
	m_cDelItem.EnableWindow();
	}
	*pResult = 0;	
}
void CUserManagement::OnOK() 
{
	if(m_bSuccess)
	{
		m_pRecordset->Update();
		m_pRecordset->Close();
	}	
	CDialog::OnOK();
}

						