exam8_1doc.cpp

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// Exam8_1Doc.cpp : implementation of the CExam8_1Doc class
//

#include "stdafx.h"
#include "Exam8_1.h"

#include "Exam8_1Doc.h"

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

/////////////////////////////////////////////////////////////////////////////
// CExam8_1Doc

IMPLEMENT_DYNCREATE(CExam8_1Doc, CDocument)

BEGIN_MESSAGE_MAP(CExam8_1Doc, CDocument)
	//{{AFX_MSG_MAP(CExam8_1Doc)
		// NOTE - the ClassWizard will add and remove mapping macros here.
		//    DO NOT EDIT what you see in these blocks of generated code!
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CExam8_1Doc construction/destruction

CExam8_1Doc::CExam8_1Doc()
{
	// TODO: add one-time construction code here

}

CExam8_1Doc::~CExam8_1Doc()
{
}

BOOL CExam8_1Doc::OnNewDocument()
{
	if (!CDocument::OnNewDocument())
		return FALSE;

	// TODO: add reinitialization code here
	// (SDI documents will reuse this document)
	nLineNum=0;	
	POSITION pos;	
	pos=lines.GetHeadPosition();	
	while(pos!=NULL)	
	{		
		((CString)lines.GetNext(pos)).Empty();  	
	}		
	lines.RemoveAll();

	return TRUE;
}



/////////////////////////////////////////////////////////////////////////////
// CExam8_1Doc serialization

void CExam8_1Doc::Serialize(CArchive& ar)
{
	CString s("");		
	int nCount=0;		
	CString item("");
	if (ar.IsStoring())
	{
		// TODO: add storing code here
		// 将文档对象中的数据存入文件
        POSITION pos;	  
		pos=lines.GetHeadPosition();//pos指向字符串链表的头部	  
		if(pos==NULL)		  
			return;	  
		while(pos!=NULL)	  
		{		  
			item=lines.GetNext(pos);//读取一行，并使pos指向下一行		  
			ar<<item;//将文本行写入到ar对象		  
			item.Empty(); 	  
		}
	}
	else
	{
		// TODO: add loading code here
		// 将文件中的数据读入到文档对象		
		while(1)		
		{  
			try{ ar>>item;//读取文本行到item	    	
			lines.AddTail(item);//将文本串加在字符串链表的尾部	    	
			nCount++;}//记录行数		
			catch(CArchiveException*e)//捕捉文件读取完毕异常		
			{		
				e->Delete();		
				break;		
			}	
		}		
		nLineNum=nCount;//修改字符串总行数	
	}
}

/////////////////////////////////////////////////////////////////////////////
// CExam8_1Doc diagnostics

#ifdef _DEBUG
void CExam8_1Doc::AssertValid() const
{
	CDocument::AssertValid();
}

void CExam8_1Doc::Dump(CDumpContext& dc) const
{
	CDocument::Dump(dc);
}
#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// CExam8_1Doc commands

void CExam8_1Doc::DeleteContents() 
{
	// TODO: Add your specialized code here and/or call the base class
	nLineNum=0;	
	POSITION pos;	
	pos=lines.GetHeadPosition();	
	while(pos!=NULL)	
	{		
		((CString)lines.GetNext(pos)).Empty();  	
	}		
	lines.RemoveAll();
	
	CDocument::DeleteContents();
}