booktypelistdlg.cpp

图书馆管理系统是典型的信息管理系统(MIS),其开发主要包括后台数据库的建立和维护以及前端应用程序的开发两个方面。对于前者要求建立起数据一致性和完整性强.数据安全性好的库。而对于后者则要求应用程序功能

// BookTypeListDlg.cpp : implementation file
//

#include "stdafx.h"
#include "LibraryM.h"
#include "BookTypeListDlg.h"

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

/////////////////////////////////////////////////////////////////////////////
// CBookTypeListDlg dialog


CBookTypeListDlg::CBookTypeListDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CBookTypeListDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CBookTypeListDlg)
	m_BookTypeInsertEdit = _T("");
	m_BookTypeID = _T("");
	//}}AFX_DATA_INIT
}


void CBookTypeListDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CBookTypeListDlg)
	DDX_Control(pDX, IDC_BOOKTYPE_LIST, m_BookTypeList);
	DDX_Text(pDX, IDC_EDIT_BOOKTYPELIST, m_BookTypeInsertEdit);
	DDX_Text(pDX, IDC_EDIT_BOOKTYPEID, m_BookTypeID);
	//}}AFX_DATA_MAP
}


BEGIN_MESSAGE_MAP(CBookTypeListDlg, CDialog)
	//{{AFX_MSG_MAP(CBookTypeListDlg)
	ON_BN_CLICKED(IDC_BOOKTYPELIST_INTERT_BTN, OnBooktypelistIntertBtn)
	ON_BN_CLICKED(IDC_BOOKTYPELIST_CANCEL_BTN2, OnBooktypelistCancelBtn2)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CBookTypeListDlg message handlers

BOOL CBookTypeListDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	//初始化数据库连接
	HRESULT result;
	try
	{
		//实例化连接对象
		result=m_pConnection.CreateInstance(_uuidof(Connection));
		if(SUCCEEDED(result))
		{
			//设置连接属性为UDL文件
			m_pConnection->ConnectionString="File Name=LIBRARYM.udl";
			//设置等待连接打开的时间为20s
			m_pConnection->ConnectionTimeout=20;
			result=m_pConnection->Open("","","",adConnectUnspecified);

			if(FAILED(result))
			{
				AfxMessageBox("open failed");
				return TRUE;
			}
		}
		else
		{
			AfxMessageBox("createinstance of connection failed!");
			return TRUE;
		}
	}
	catch(_com_error e)
	{
		//输出异常信息
		_bstr_t bstrSource(e.Source());
		_bstr_t bstrDescription(e.Description());
		AfxMessageBox(bstrSource+bstrDescription);
		return TRUE;
	}
	//初始化列表
	m_BookTypeList.InsertColumn(0,"ID",LVCFMT_LEFT,100);
	m_BookTypeList.InsertColumn(1,"TypeName",LVCFMT_CENTER,100);
	//选中一行
	m_BookTypeList.SetExtendedStyle(LVS_EX_FULLROWSELECT|LVS_EX_GRIDLINES);

	InitListCtrl();

	return true;
}

void CBookTypeListDlg::InitListCtrl()    //booktypeList的初始化，过程跟booklist的初始化一样
{
	HRESULT hr;
	_RecordsetPtr pBookTypeList;
	hr=pBookTypeList.CreateInstance(_uuidof(Recordset));
	if(FAILED(hr))
	{
		AfxMessageBox("createinstance of recordset failed!\ncan't initiate booktype list control!");
		return;
	}

	CString strSql;
	_variant_t getvar;
	CString strValue;
	int curItem=0;
	strSql="select * from BookType";
	try
	{
		hr=pBookTypeList->Open(_variant_t(strSql),m_pConnection.GetInterfacePtr(),
			adOpenDynamic,adLockOptimistic,adCmdText);
		if(SUCCEEDED(hr))
		{
			while(!pBookTypeList->adoEOF)
			{
				getvar=pBookTypeList->GetCollect("BookTypeID");
				if(getvar.vt!=VT_NULL)
				{
					strValue=(LPCSTR)_bstr_t(getvar);
				}
				else
					strValue=" ";
				m_BookTypeList.InsertItem(curItem,strValue);


				getvar=pBookTypeList->GetCollect("TypeName");
				if(getvar.vt!=VT_NULL)
				{
					strValue=(LPCSTR)_bstr_t(getvar);
				}
				else
					strValue=" ";
				m_BookTypeList.SetItemText(curItem,1,strValue);

				pBookTypeList->MoveNext();
				curItem++;
			}
		}
		else
		{
			AfxMessageBox("open recordset failed!");
		}
	}
	catch(_com_error *e)
	{
		AfxMessageBox(e->ErrorMessage());
		return;
	}
	pBookTypeList->Close();
	pBookTypeList=NULL;
}


void CBookTypeListDlg::OnBooktypelistIntertBtn() 
{
	UpdateData(TRUE); //得到输入
	//判断是否输入了BookTypeID 和 BookTypeName
	if(m_BookTypeID.IsEmpty() || m_BookTypeInsertEdit.IsEmpty())
	{
		AfxMessageBox("empty input!");
		return;
	}
	_RecordsetPtr pset;
	pset.CreateInstance(_uuidof(Recordset));
	HRESULT hr;
	try
	{
		hr=pset->Open("select * from BookType",m_pConnection.GetInterfacePtr(),
			adOpenDynamic,adLockOptimistic,adCmdText);
		//添加记录
		if(SUCCEEDED(hr))
		{
			pset->AddNew();
			//写入每个字段值
			pset->PutCollect("BookTypeID",_variant_t(m_BookTypeID));
			pset->PutCollect("TypeName",_variant_t(m_BookTypeInsertEdit));
			pset->Update();
		}
	}
	catch(_com_error *e)
	{
		AfxMessageBox(e->ErrorMessage());
		return;
	}
	pset->Close();
	pset=NULL;
	m_BookTypeList.DeleteAllItems();
	InitListCtrl();
}

void CBookTypeListDlg::OnBooktypelistCancelBtn2() 
{
	CDialog::OnCancel();	
}