How to create and open a file

Creating and opening a file

A common pattern is to attempt to open an existing file, without replacing its existing data, and create it if it does not exist.

1. Use Open() to open an existing file for reading or writing - an error is returned if it does not already exist.

2. Use Create() to create and open a new file for writing.

       
        
       
       TInt err=file.Open(fsSession,fileName,shareMode);
if (err==KErrNotFound) // file does not exist - create it
    err=file.Create(fsSession,fileName,shareMode);
      

Specifying a share and access mode

Use various flags to specify how a file is opened.

       
        
       
       // Open a file as text, writable, and shared with other clients
RFile file;
_LIT(KFileName, "FILENAME.CPP");
file.Open(fsSession,KFileName,EFileStreamText|EFileWrite|EFileShareAny);