RFs 目录操作

RFs 目录操作

RFs 可以通过 Connect() 连接到文件服务器，完毕后通过 Close() 关闭连接

常用操作：

1. MkDir 与 MkDirAll 创建目录
2. GetDir 可以得到 目录的列表到一个 CDir 对像中，这个CDir保存每个一目录的信息，用 TEntry 保存
3. 通过 TEntry 得到每个目录的信息
4. 注意的是对于目录的结尾一定加上 “\\”，否则认为不是一个目录
5. SessionPath 会得到当前会话的路径，SetSessionPath 设置路径
6. 头文件加上 f32file.h ，mmp 文件的 library 中添加上 efsrv.lib，然后重新编译

下面是练习用到的代码

#include <f32file.h>

//  Constants
_LIT(KTextConsoleTitle, "Console");
_LIT(KTextFailed, " failed, leave code = %d");
_LIT(KTextPressAnyKey, " [press any key]\n");

//  Global Variables
LOCAL_D CConsoleBase* console;  // write all messages to this
LOCAL_D RFs iFs;
void printDriveInfo()
{
 // 连接文件服务器
 User::LeaveIfError(iFs.Connect());
 _LIT(KEnter,"\n");
 _LIT(KPromp,"There are drives list:\n");
 _LIT(KChar,"%c\n");
 console->Printf(KPromp);
 TChar DriveLetter;
 TDriveList dList;
 iFs.DriveList(dList);
 for(TInt i=0;i<dList.Length();i++)
 {
  if (dList[i])
  {
   iFs.DriveToChar(i,DriveLetter);
   console->Printf(KChar,DriveLetter);
   console->Printf(KEnter);
  }
 }

 // 用完后，关闭连接
 iFs.Close();
}
void printDirInfo(const TEntry&);
void viewDirInfo()
{
 User::LeaveIfError(iFs.Connect());
 _LIT(KMyDir,"c:\\myfile\\");
 _LIT(KmyDirAll,"c:\\mytxtfile\\txt\\");
    _LIT(KretInfo,"return code=%d");
 TInt iRet;
 iRet = iFs.MkDir(KMyDir);
 console->Printf(KretInfo,iRet);
 iRet = iFs.MkDirAll(KmyDirAll);
 console->Printf(KretInfo,iRet);
 TBuf<20> sessionPath;
 User::LeaveIfError(iFs.SessionPath(sessionPath));
 _LIT(K1,"session path is:");
 _LIT(KEnter,"\n");
 console->Printf(K1);
 console->Printf(sessionPath);
 console->Printf(KEnter);
 TBuf<20> defaultSessionPath;
 User::LeaveIfError(iFs.DefaultPath(defaultSessionPath));
 _LIT(K2,"default path:");
 console->Printf(K2);
 console->Printf(defaultSessionPath);
 console->Printf(KEnter);
 _LIT(KNewPath,"c:\\myfile\\");
 User::LeaveIfError(iFs.SetSessionPath(KNewPath));
 User::LeaveIfError(iFs.SessionPath(sessionPath));
 console->Printf(K1);
 console->Printf(sessionPath);
 console->Printf(KEnter);
 
    _LIT(KDir,"C:\\mytxtfile\\");
 CDir* dir = NULL;
 console->ClearScreen();
 User::LeaveIfError(iFs.GetDir(KDir,KEntryAttNormal|KEntryAttMatchMask,ESortNone,dir));
 for(TInt i=0;i<dir->Count();i++)
 {
  printDirInfo((*dir)[i]);
  console->Getch();
  console->ClearScreen();
  console->Printf(KEnter);
 }
 
 iFs.Close();
}
void printDirInfo(const TEntry& aEntry)
{
 _LIT(Kentery,"\n");
 _LIT(KIsDir,"directory\n");
 _LIT(KIsReadOnly,"Readonly\n");
 _LIT(KIsHidden,"Hidden\n");
 _LIT(KIsSystem,"System\n");
 _LIT(KIsArchive,"Archive\n");
 console->Printf(aEntry.iName);
 console->Printf(Kentery);
 TBuf<30> dateString;
 _LIT(KDatestring4,"%Y%M%D%/0%1%/1%2%/2%3%/3 %:0%H%:1%T%:2%S\n");
 aEntry.iModified.FormatL(dateString,KDatestring4);
 console->Printf(dateString);
 _LIT(KFmt1,"size:%d bytes\n");
 console->Printf(KFmt1,aEntry.iSize);
 if (aEntry.IsDir())
  console->Printf(KIsDir);
 if (aEntry.IsReadOnly())
  console->Printf(KIsReadOnly);
 if (aEntry.IsHidden())
  console->Printf(KIsHidden);
 if (aEntry.IsSystem())
  console->Printf(KIsSystem);
 if (aEntry.IsArchive())
  console->Printf(KIsArchive);
}
//  Local Functions
LOCAL_C void MainL(const TDesC& aArgs)
    {
    //
    // add your program code here, example code below
    //
    //console->Write(_L("Hello, world!\n"));
 //printDriveInfo();
 viewDirInfo();
    console->Printf(_L("Command line args: \"%S\"\n"), &aArgs);
    }

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