用CPtrList AddTail 向链表尾插入元素。表头元素也随着变化？

[wisoper]

	//	AfxMessageBox(m_myContent->temp5); 从1到27有变化
		strItemName="";
		m_contlist->AddTail(m_myContent);
		CExcelCondent* m_myContent1 = (CExcelCondent*)m_contlist->GetTail();
		CExcelCondent* m_myContent2 = (CExcelCondent*)m_contlist->GetHead();
		AfxMessageBox("表尾元素为："+m_myContent1->temp5); 
	//	AfxMessageBox("表头元素为："+m_myContent2->temp5);//表头本应不变，但也随着增大；

上面那一段是我向表尾插入元素（例如：从1到27），但表头元素也从1增加到27.最后结果是表中所有元素都是27.不知道是为什么？

CPtrList* ReadExcel::OperExcel2()
{
// Excel应用对象 
	_Application  m_oExcelApp;   // Excel程序 
	_Worksheet  m_oWorkSheet;   // 工作表 
	_Workbook  m_oWorkBook;   // 工作簿 
	Workbooks  m_oWorkBooks;  // 工作簿集合 
	Worksheets  m_oWorkSheets;  // 工作表集合 
	Range  m_oCurrRange;   // 使用区域 

//	if (CoInitialize(NULL)!=0) 
	if(!AfxOleInit())
	{     
		AfxMessageBox("初始化COM支持库失败!");     
		exit(1); 
	} 
	if (!m_oExcelApp.CreateDispatch( _T( "Excel.Application" ), NULL ) ) 
	{    
		::MessageBox( NULL, _T( "创建Excel服务失败！" ), _T( "错误提示！" ), MB_OK | MB_ICONERROR);    
		exit(1); 
	}   //设置为显示 
	m_oExcelApp.SetVisible(FALSE); 
	m_oWorkBooks.AttachDispatch( m_oExcelApp.GetWorkbooks(), TRUE ); //没有这条语句，下面打开文件返回失败。   
	LPDISPATCH lpDisp = NULL; COleVariant covTrue((short)TRUE);
	COleVariant covFalse((short)FALSE); 
	COleVariant covOptional((long)DISP_E_PARAMNOTFOUND, VT_ERROR);  
	Range  oCurCell;   // 打开文件 
	lpDisp = m_oWorkBooks.Open( "E:\\\\1.xls",     
		_variant_t(vtMissing),     
		_variant_t(vtMissing),     
		_variant_t(vtMissing),     
		_variant_t(vtMissing),     
		_variant_t(vtMissing),     
		_variant_t(vtMissing),     
		_variant_t(vtMissing),     
		_variant_t(vtMissing),     
		_variant_t(vtMissing),     
		_variant_t(vtMissing),     
		_variant_t(vtMissing),     
		_variant_t(vtMissing),     
		_variant_t(vtMissing),     
		_variant_t(vtMissing) ); 
	// 获得活动的WorkBook( 工作簿 ) 
	m_oWorkBook.AttachDispatch( lpDisp, TRUE ); 
	// 获得活动的WorkSheet( 工作表 ) 
	m_oWorkSheet.AttachDispatch( m_oWorkBook.GetActiveSheet(), TRUE ); 
	// 获得使用的区域Range( 区域 ) 
	m_oCurrRange.AttachDispatch( m_oWorkSheet.GetUsedRange(), TRUE );   
	// 获得使用的行数 
	long lgUsedRowNum = 0; 
	m_oCurrRange.AttachDispatch( m_oCurrRange.GetRows(), TRUE ); 
	lgUsedRowNum = m_oCurrRange.GetCount(); 
	// 获得使用的列数 
	long lgUsedColumnNum = 0; 
	m_oCurrRange.AttachDispatch( m_oCurrRange.GetColumns(), TRUE ); 
	lgUsedColumnNum = m_oCurrRange.GetCount(); 
	// 读取Sheet的名称 
	CString strSheetName = m_oWorkSheet.GetName();   
	//得到全部Cells，此时,CurrRange是cells的集合 
	m_oCurrRange.AttachDispatch( m_oWorkSheet.GetCells(), TRUE ); 
	

	CExcelCondent* m_myContent =new CExcelCondent();

	m_contlist= new CPtrList();

	for ( int i = 0; i < lgUsedRowNum; ) 
	{   
		// 获取该列第一个元素
  		oCurCell.AttachDispatch( m_oCurrRange.GetItem( COleVariant( (long)(i + 1)), COleVariant( (long)1 ) ).pdispVal, TRUE );    
		VARIANT varItemName = oCurCell.GetText();    
		CString strItemName;    
		strItemName = varItemName.bstrVal; 
	//	AfxMessageBox( strItemName );
		// 将值存入结构中
		m_myContent->temp1=strItemName;
	//	AfxMessageBox(m_myContent->temp1);
		//获取该列第二个元素
		oCurCell.AttachDispatch( m_oCurrRange.GetItem( COleVariant( (long)(i + 1)), COleVariant( (long)2 ) ).pdispVal, TRUE );    
		varItemName = oCurCell.GetText();      
		strItemName = varItemName.bstrVal; 
		ASSERT(m_myContent != NULL);
		m_myContent->temp2=strItemName;
		//获取该列第三个元素	
		oCurCell.AttachDispatch( m_oCurrRange.GetItem( COleVariant( (long)(i + 1)), COleVariant( (long)3 ) ).pdispVal, TRUE );    
		varItemName = oCurCell.GetText();    	 
		m_myContent->temp3=strItemName;

		//获取该列第四个元素	
		oCurCell.AttachDispatch( m_oCurrRange.GetItem( COleVariant( (long)(i + 1)), COleVariant( (long)4 ) ).pdispVal, TRUE );    
		varItemName = oCurCell.GetText();    
		m_myContent->temp4=strItemName;

		//获取该列第五个元素	
		oCurCell.AttachDispatch( m_oCurrRange.GetItem( COleVariant( (long)(i + 1)), COleVariant( (long)5) ).pdispVal, TRUE );    
		varItemName = oCurCell.GetText();     
		m_myContent->temp5=strItemName;

		// 将结构存入表尾

		ASSERT(m_contlist != NULL);
	//	AfxMessageBox(m_myContent->temp5); 从1到27有变化
		strItemName="";
		m_contlist->AddTail(m_myContent);
		CExcelCondent* m_myContent1 = (CExcelCondent*)m_contlist->GetTail();
		CExcelCondent* m_myContent2 = (CExcelCondent*)m_contlist->GetHead();
		AfxMessageBox("表尾元素为："+m_myContent1->temp5); 
	//	AfxMessageBox("表头元素为："+m_myContent2->temp5);//表头本应不变，但也随着增大；

		i++; 
	} 


	// 关闭 
	m_oWorkBook.Close( covOptional, COleVariant( "E:\\\\1.xls" ), covOptional ); 
	m_oWorkBooks.Close(); 
	// 释放 
	m_oCurrRange.ReleaseDispatch(); 
	m_oWorkSheet.ReleaseDispatch(); 
	m_oWorkSheets.ReleaseDispatch(); 
	m_oWorkBook.ReleaseDispatch(); 
	m_oWorkBooks.ReleaseDispatch(); 
	m_oExcelApp.ReleaseDispatch(); 
	m_oExcelApp.Quit();  
	// 这条语句是推出Excel程序，任务管理器中的EXCEL进程会自动结束。


    return m_contlist;
 
}

[wisoper]

m_contlist是 CPrtList* 类型的变量

[wisoper]

引用 2 楼 zgl7903的回复:

CExcelCondent* m_myContent =new CExcelCondent(); 作用域不对, 放到循环中

恩。谢谢。问题我找到了。

[zgl7903]

CExcelCondent* m_myContent =new CExcelCondent(); 作用域不对, 放到循环中