ReNamer:Pascal Script:Read file content

There are several functions available which make this task simple, for example: FileReadContent, FileReadLine and FileCountLines. Below are several examples of how to use these functions.

Warning: Some functions are able to alter your file system, so use those with caution! Also, remember that processing large files in the script can dramatically slow down renaming process.

Read first few characters

Here is how you can insert into the filename first few characters of file content.

<syntaxhighlight lang="pascal"> begin

 FileName := FileReadFragment(FilePath, 0, 20) + ' ' + FileName;

end. </source>

Find and extract specific portion

Imagine that you are processing large number HTML files which have ban names. You want to insert the HTML Title into the name for files, i.e. the content of the <title> tag. This would require reading the file, finding the title tag, and extracting the text inside the tag. Below is a simple example:

<syntaxhighlight lang="pascal"> var

 Text, Title: String;
 TitleStart, TitleEnd: Integer;

begin

 Text := FileReadContent(FilePath);
 TitleStart := Pos('<title>', Text);
 TitleEnd := Pos('</title>', Text);
 if (TitleStart > 0) and (TitleEnd > 0) then
 begin
   TitleStart := TitleStart + Length('<title>');
   Title := Copy(Text, TitleStart, TitleEnd-TitleStart);
   FileName := Title + ' ' + FileName;
 end;

end. </source>

Note: The script is a simple demonstration and in real cases might not work for all of the files, for example if title tag is written as "<TITLE>" instead of "<title>".

Read lines from file

For example, if you have a text file containing names (one name per line) which you would like to assign to a list of files, you can use the script below:

<syntaxhighlight lang="pascal"> var

 I: Integer;

begin

 I := I + 1;
 FileName := FileReadLine('C:\Names.txt', I);

end. </source>