Write to a file

[MrKintaro]

hi,

can someone explain me how to open a file and add at the beginning of the file a string without overwrite what there is in the file?

Code: Select all

main()
{
  int i, tell;
  string path;
  
  file f; // our file
  int err; // error code  

  dyn_float value;
value[1]=12.123;
value[2]=8.0;
value[3]=3.1;
  
  
  path = getPath(SCRIPTS_REL_PATH);
  DebugN(path);
  //dyn_string s=getFileNames(path, "*",FILTER_DIRS);
  dyn_string s=getFileNames(path, "SetDescription.ctl",FILTER_FILES);

  for(i=1; i

[mkoller]

you can't INSERT something into a file.
What you have to do in this case is to:
1) write the new content into a new file
2) read the whole old content and append it to the new file
3) remove the old file
4) rename the new to the old file

[MrKintaro]

Hi Martin,

fileToString maybe an option.

do you know the limit of fileToString?

how big can be the string where I write the file?

[MrKintaro]

My point is becase I am searching a way how to encrypt the full Project but I have to insert the key in every file.

[mkoller]

The limit is RAM

[leoknipp]

Denis Pregnolato wrote:

My point is becase I am searching a way how to encrypt the full Project but I have to insert the key in every file.

Can you please describe which part of the project you want to encrypt.
Encrypting the full project is not possible by adding information to files, e.g. the database files cannot be modified by adding some text.

Best Regards
Leopold Knipp
Senior Support Specialist

[MrKintaro]

It seems very easy task but I am getting some trouble.

I want to encrypt our library that has a deep structure:

I have to loop through all the script in all folder and subfolder, but I am not finding a way to do it recursively and add the string // $License: NOLICENSE.

it seems a stupid function but I not able to loop tought the structure in a easy way.

To add the string I found the function.

[RudiKreiner]

Have a look at the functions getFileNames() and isfile() in WinCC Help.
If you use getFileNames() recursively on all directories found you should easily be able to work you way through your whole file structure.

[leoknipp]

I've written a function which creates a list of panel files (including all sub folders) for a given path.

The code for the function I have copied to the posting, the result is written to the global variable ds_panelFilesRecursive:

dyn_string ds_panelFilesRecursive;

getFiles(string s_path)
{
dyn_string ds_panelFiles;
int i;

DebugTN(__LINE__,"call getFileNames",s_path);
ds_panelFiles = getFileNames(s_path,"*",FILTER_FILES | FILTER_DIRS);
DebugTN(__LINE__,"result of getFileNames",ds_panelFiles);

for(i=1;i

[Gertjan van Schijndel]

Just use the function 'getYoungerFiles' with as 'startTime' the value 0.