Read one line from File

[wolf4124]

Hello.

i will read alwas one line from the file.

Can you give me a comando?

Thanks

[Wim S]

Just use the ReadLine function. Check the returned value to see the number of bytes that were read from the file.

[wolf4124]

Hello,

thanks for your answer.

Can you send me the metode how i can detect the end of the file.

In the Errorhandle isn't a message.

wolf4124

[Wim S]

Hello,

the function ReadLine returns -2 if the end of the file is reached, and -1 if an error occurred. Here is some piece of code to show you an example:

 filehandle = OpenFile (pathname, VAL_READ_ONLY, VAL_OPEN_AS_IS, VAL_ASCII);

 // Check if the file could be opened.
 if (filehandle == -1 && (error = GetFmtIOError())){
  MessagePopup ("Unable to open the file", GetFmtIOErrorString (error)); 
  return 0;
 }

// Get the data from the file.

while ((num_bytes = ReadLine (filehandle, linebuf, MAX_STRING_LEN-1)) >= 0){
  if (num_bytes > 0){
   // Do something with the bytes you read from the file...
  }
 }
 
 // Check if an error occurred while reading from the file.
 if (num_bytes == -1 && (error = GetFmtIOError ()) > 0){
  MessagePopup ("Error while reading from file", GetFmtIOErrorString (error));
  return 0;
 }

Message Edited by Wim S on 10-10-2006 03:22 PM

[wolf4124]

Thanks.

wolf4124