This tool can be used to convert the Qt Compressed Help File *.qch from Siemens WinCC OA to PDF.
The following software must be installed on the system:
| Dependency | Source | Tested Version |
|---|---|---|
| wkhtmltopdf | website | 0.12.6 |
Compile the C# project with Visual Studio.
QtCompressedHelpExtractor.exe [source-file] [target-directory]
For example if you want to export the html pages of the WinCC OA 3.14 manual:
[source-file] = "C:\Siemens\Automation\WinCC_OA\3.14\help\en_US.utf8\WinCC_OA.qch"
[target-directory] = "C:\Temp\WinCC-OA-Manual-3.14\"
*.qch files are SQLite 3 database files.
The tool extracts and decompresses the html and other files from the help file into the [target-directory].
Then, it extracts the table of content from the help file into [target-directory]\content.txt. This determines the order of the html files in the final PDF.
Last but not least, wkhtmltopdf is used to create the PDF [target-directory]\output.pdf.
The last step can take several minutes and can use several gigabytes of RAM.