file.cpp

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// File.cpp: implementation of the CFile class.
//
//////////////////////////////////////////////////////////////////////

#include "File.h"
#include <s32file.h>
#include <eikenv.h>
//#include "UserInfo.h"
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

CFile::CFile()
{

}

CFile::~CFile()
{

}

void CFile::WriteUserInfoToFileByStream( TDes &aName, TDes &aPassword )
{
	//创建会话
	RFs iFession;
	User::LeaveIfError(iFession.Connect());
	
	//删除文件
	iFession.Delete(_L("SiriusUser.str"));
	
	//以写的方式创建流文件
	//对应模拟器中路径：C:\Symbian\7.0s\Series60_v21_C\Epoc32\wins\c\testStream.str
	RFileWriteStream writeStream;
	User::LeaveIfError(writeStream.Create(iFession, _L("C:\\SiriusUser.str"), EFileWrite));
	
	//压栈
	writeStream.PushL();
	
	//从EDIT获取用户输入的数据
	//HBufC*	pStrName = HBufC::NewL(30);	//pStr->Des().Copy(_L("Data stream of file !"));
	//HBufC*	pStrPassword = HBufC::NewL(30);

	//将用户输入的数据存放到pStr中
	//TPtr pTprStrName(pStrName->Des()), pTprStrPassword(pStrPassword->Des());
	//pTprStrName.Copy(aName);
    	//pTprStrPassword.Copy(aPassword);
	
	//写数据长度到流文件
	//写数据到流文件：外化
	writeStream.WriteInt32L(aName.Length());
	writeStream << aName;
	
	writeStream.WriteInt32L(aPassword.Length());
	writeStream << aPassword;	
	
	//writeStream.WriteL(pStr->Des());
	
	//清除/释放空间
	//delete pStrName;
	//delete pStrPassword;
	
	//提交
	writeStream.CommitL();
	//弹栈
	writeStream.Pop();
	//释放资源
	writeStream.Release();
	writeStream.Close();
	//关闭会话
	iFession.Close();	
}

void CFile::ReadUserInfoFromFileByStream( CUserInfo &aUserInfo )
{
	//创建会话
	RFs iFession;
	User::LeaveIfError(iFession.Connect());
	
	RFileReadStream readStream;

	//压栈
	readStream.PushL();

	//以读取流文件的方式打开流文件
	//对应模拟器中路径：C:\Symbian\7.0s\Series60_v21_C\Epoc32\wins\c\testStream.str
	if( KErrNone != readStream.Open(iFession, _L("C:\\SiriusUser.str"), EFileRead))
	{
		//若文件打开失败，则先关闭会话再返回
		//弹栈
		readStream.Pop();
		readStream.Release();
		iFession.Close();
		return;
	}
	
	//打开流文件成功
	//读取流长度
	TInt nLen = 0, nLenth = 0;
	nLen = readStream.ReadInt32L();
	
	//判断流内容长度
	if(nLen > 0)
	{
		//若流数据内容长度大于零，则申请空间
		HBufC*	pStrName = HBufC::NewL(nLen);
		CleanupStack::PushL(pStrName);
		//读取流数据内容：内化
		readStream >> pStrName->Des();
		aUserInfo.SetName( pStrName->Des() );
		nLenth = readStream.ReadInt32L();
		HBufC*	pStrPassword = HBufC::NewL(nLenth);
		CleanupStack::PushL(pStrPassword);
		readStream >> pStrPassword->Des();
		aUserInfo.SetPassword( pStrPassword->Des() );
		//readStream.ReadL(pStr->Des(), nLen);
		
		//显示读取到的内容
		//CAknInformationNote* informationNote = new (ELeave) CAknInformationNote;
		//informationNote->ExecuteLD(pStr->Des());
		CleanupStack::PopAndDestroy(2);
		//清理空间
//		delete pStrName;
//		delete pStrPassword;
	}
	
	//弹栈
	readStream.Pop();
	//释放
	readStream.Release();
	readStream.Close();
	//关闭会话
	iFession.Close();		
}
void CFile::ReadNoteInfoFromFileByStream(CArrayVarFlat<CNoteInfo>* aNoteInfo)
{
	 _LIT(KNoteInfo, "C:\\SiriusNote.data");
	 RFs iFession;
	 User::LeaveIfError(iFession.Connect());

	 //RFs& Fession = CEikonEnv::Static()->FsSession();

	 RFileReadStream readStream;
	 readStream.PushL();
	 if(KErrNone != readStream.Open(iFession, KNoteInfo, EFileRead))
	 {
		 readStream.Pop();
		 readStream.Release();
   		 iFession.Close();
	 	return ;
	 }
	 
	 TInt32 Length = 0;
	 Length = readStream.ReadInt32L();//读取记事信息的条数

	 for(TInt32 i=0; i<Length; ++i)
	 {
		 CNoteInfo* note = new(ELeave) CNoteInfo;
		 CleanupStack::PushL(note);
		 note->InternalizeL(readStream);//内化
		 aNoteInfo->AppendL(*note,sizeof(*note));
		 CleanupStack::Pop(note);
		 delete note;
	}

// 	 for(TInt32 i=0; i<Length; ++i)
// 	 {
// 		CNoteInfo* user = new(ELeave) CNoteInfo;
// 	 	CleanupStack::PushL(user);
// 	 	TInt32 nLengthTitle = readStream.ReadInt32L();//标题长度
// 		if(nLengthTitle > 0)
// 		{		
// 			HBufC* bufTile;
// 			bufTile = HBufC::NewL(nLengthTitle);
// 			readStream >> bufTile->Des();
// 			user->SetTitle(bufTile->Des());	
// 			delete bufTile;
// 		}
// 		TInt nLengthContent = readStream.ReadInt32L();//内容的长度
// 	 	if(nLengthContent > 0)
// 	 	{
// 			HBufC* bufContent = HBufC::NewL(nLengthContent);
// 			readStream >> bufContent->Des();
// 	 		user->SetContent(bufContent->Des());
// 			delete bufContent;
// 	 	}
//		aNoteInfo->AppendL(*user,sizeof(*user));
//	 	CleanupStack::Pop(user);
//	 }	 
	 readStream.Pop();
	 readStream.Release();
	 
	 readStream.Close();
	 iFession.Close();
}

void CFile::WriteNoteInfoToFileByStream(CArrayVarFlat<CNoteInfo>* aNoteInfo)
{
	_LIT(KNoteInfo, "C:\\SiriusNote.data");
	
	//建立会话
	//	RFs& Fession = CEikonEnv::Static()->FsSession();
	RFs Fession;
	User::LeaveIfError(Fession.Connect());
	Fession.Delete(KNoteInfo);

	RFileWriteStream WriteStream;

//	CleanupStack::PushL(WriteStream);

	User::LeaveIfError(WriteStream.Create(Fession,KNoteInfo,EFileWrite));

	TInt32 nLengthCount = aNoteInfo->Count();

	WriteStream.WriteInt32L(nLengthCount);//写进总长度

	for(TInt i = 0;i < nLengthCount;i++)
	{
 		CNoteInfo* iTempInfo = &( aNoteInfo->At(i) );
		iTempInfo->ExternalizeL(WriteStream);
		iTempInfo->Delete();
//		delete iTempInfo;
		
//		iTempInfo = NULL;
	}
//	CleanupStack::Pop(WriteStream);
	WriteStream.CommitL();
	WriteStream.Release();	
	WriteStream.Close();
	Fession.Close();
	aNoteInfo->Reset();
}

//void FileLoad();
//void FileSave();