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Do you have an example on how I can use C# to pass through all of the pages of a pdf file and check each page to determine whether it is color or black and white?

I have a license for Spool File Page Counter SDK.

I found this url,
http://www.verypdf.com/wordpress/201106/counting-the-exact-number-of-pages-in-any-pdf-document-732.html#comments

It appears that I am using the demo version. How do I get the production version?

Customer
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Thanks for your message, you may download "Spool File Page Counter SDK" from this web page,

https://www.verydoc.com/spool-page-count.html
https://www.verydoc.com/ps-and-pcl-info-sdk.zip

after you download it, please unzip it to a folder, you will see "C-Sharp" and "C-Sharp-AnyCPU" two folders are included in the ps-and-pcl-info-sdk.zip file, these folders are C# examples, you can compile and run them in "Microsoft Visual Studio" properly.

You can call "ReadInfo.dll" from C# code directly, this is a C# example to call the "ReadInfo.dll" directly,

-----------------------------------
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;

namespace ParsingTest {
    class Program {

        [DllImport("ReadInfo.dll", EntryPoint = "ReadInfoFromPCLFile")]
        public static extern Int32 ReadInfoFromPCLFile(
            string fileName,
            Int32 bIsRenderToPDF,
            ref uint bwPageCount,
            ref uint colorPageCount,
            ref uint copyCount,
            ref double pagewidth,
            ref double pageheight,
            StringBuilder paperSizeName);

        [DllImport("ReadInfo.dll", EntryPoint = "ReadInfoSetCode")]
        public static extern void ReadInfoSetCode(string strCode);

        static void Main(string[] args)
        {
            if (args.Length != 1)
            {
                Console.WriteLine("test.exe C:\\test.pcl");
                Console.WriteLine("test.exe C:\\test.ps");
                return;
            }
            Console.Write("args length is ");
            Console.WriteLine(args.Length); // Write array length
            for (int i = 0; i < args.Length; i++) // Loop through array
            {
                string argument = args[i];
                Console.Write("args index ");
                Console.Write(i); // Write index
                Console.Write(" is [");
                Console.Write(argument); // Write string
                Console.WriteLine("]");
            }
            string fileName = args[0];
            int bIsRenderToPDF = 1;
            uint bwPageCount = 0;
            uint colorPageCount = 0;
            uint copyCount = 0;
            double nPageWidth = 0;
            double nPageHeight = 0;
            StringBuilder strPaperSizeName = new StringBuilder(300);

            ReadInfoSetCode("XXXXXXXXXXXXXXXXXX");
            ReadInfoFromPCLFile(fileName, bIsRenderToPDF, ref bwPageCount, ref colorPageCount, ref copyCount, ref nPageWidth, ref nPageHeight, strPaperSizeName);

            Console.WriteLine(String.Format("File: {0}", fileName));
            Console.WriteLine(String.Format("Render To PDF: {0}", bIsRenderToPDF));
            Console.WriteLine(String.Format("BW Pages: {0}", bwPageCount));
            Console.WriteLine(String.Format("Color Pages: {0}", colorPageCount));
            Console.WriteLine(String.Format("Width: {0}", nPageWidth));
            Console.WriteLine(String.Format("Height: {0}", nPageHeight));
            Console.WriteLine(String.Format("Paper name: {0}", strPaperSizeName));
        }
    }
}
-----------------------------------

We are also provide a COM interface (FileInfoCOM.exe) based on ReadInfo.dll library, you can also call FileInfoCOM.exe from C# code instead of ReadInfo.dll library, please by following steps to use FileInfoCOM.exe COM interface,

1. Launch a CMD window by administrator privilege, run following command line to register FileInfoCOM.exe,

FileInfoCOM.exe /regserver

You can also run "install.vbs" to register FileInfoCOM.exe into your system.

2. After you register FileInfoCOM.exe into your system, you can add a reference to FileInfoCOM.exe from your C# code,

-----------------------------------
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using FileInfoCOM;

namespace ParsingTest {
    class Program {

        static void Main(string[] args)
        {
            if (args.Length != 1)
            {
                Console.WriteLine("test.exe C:\\test.pcl");
                Console.WriteLine("test.exe C:\\test.ps");
                return;
            }
            Console.Write("args length is ");
            Console.WriteLine(args.Length); // Write array length
            for (int i = 0; i < args.Length; i++) // Loop through array
            {
                string argument = args[i];
                Console.Write("args index ");
                Console.Write(i); // Write index
                Console.Write(" is [");
                Console.Write(argument); // Write string
                Console.WriteLine("]");
            }
            string fileName = args[0];
            int bIsRenderToPDF = 0;
            int bwPageCount = 0;
            int colorPageCount = 0;
            int copyCount = 0;
            double nPageWidth = 0;
            double nPageHeight = 0;
            string strPaperSizeName = new string(' ', 300);

            FileInfoCOM.FileInfoClass objFileInfoCom = new FileInfoCOM.FileInfoClassClass();

            objFileInfoCom.com_ReadInfoSetCode("XXXXXXXXXXXXXXXXXX");
            objFileInfoCom.com_ReadInfoFromPCLFile(fileName, bIsRenderToPDF, ref bwPageCount, ref colorPageCount, ref copyCount, ref nPageWidth, ref nPageHeight, ref strPaperSizeName);

            Console.WriteLine(String.Format("File: {0}", fileName));
            Console.WriteLine(String.Format("Render To PDF: {0}", bIsRenderToPDF));
            Console.WriteLine(String.Format("BW Pages: {0}", bwPageCount));
            Console.WriteLine(String.Format("Color Pages: {0}", colorPageCount));
            Console.WriteLine(String.Format("Width: {0}", nPageWidth));
            Console.WriteLine(String.Format("Height: {0}", nPageHeight));
            Console.WriteLine(String.Format("Paper name: {0}", strPaperSizeName));
        }
    }
}
-----------------------------------

If you encounter any problem, please feel free to let us know, we will assist you asap.

VeryPDF