Dear all,

I am trying to figure out how I can access the text in a PDF file from a C# Windows application. I would have thought this shouldn't be too difficult using the Acrobat API. Specifically, I would like to do the following:

- Get a string from the user
- Get a PDF file name from the user
- Check, if the string is contained in the text of the PDF file

I checked various forums and sites, but got lost trying to include the Acrobat DLLs and making them work through the API. The above should only require a few lines of code. Could anyone point me to a useful web source or code snippets that I can exploit?
Thanks a million in advance.

Kind regards,

Martin

Martin,

I'm not familiar with the Acrobat API but I've done some work with other APIs. Generally, I find the issues with passing parameters are related to marshalling. When you define the exported API function for use in your code you have to marshal string parameters as UnmanagedType.LPStr as in this definition:

        [DllImport("piapi32.dll", SetLastError = false,
            CharSet = CharSet.Ansi, EntryPoint = "piut_login",
            CallingConvention = CallingConvention.StdCall)]
        protected static extern Int32 piut_login(
            [MarshalAs(UnmanagedType.LPStr)] String Username,
            [MarshalAs(UnmanagedType.LPStr)] String Password,
            ref Int32 Access);

Note that the returned integer and referenced integer parameter didn't require any special treatment.

Hope this helps.


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