Doc theDoc = new Doc();

theDoc.Read(Server.MapPath("../Pdfreports/Procedure_Report_" + ReportId.ToString() + ".pdf"));

// set up the rendering parameters

theDoc.Rendering.ColorSpace = "Gray";

theDoc.Rendering.BitsPerChannel = 1;

theDoc.Rendering.DotsPerInchX = 200;

theDoc.Rendering.DotsPerInchY = 400;

// loop through the pages

int n = theDoc.PageCount;

for (int i = 1; i <= n; i++)

{

theDoc.PageNumber = i;

theDoc.Rect.String = theDoc.CropBox.String;

theDoc.Rendering.SaveAppend = (i != 1);

//theDoc.Rendering.SaveCompression = XRendering.Compression.G4;

theDoc.SetInfo(0, "ImageCompression", "4");

theDoc.Rendering.Save(Server.MapPath("../Pdfreports/Procedure_Report_" + ReportId.ToString() + "_" + i.ToString() + ".tiff"));

}

theDoc.Clear();

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;
using WebSupergoo.ABCpdf7;
using WebSupergoo.ABCpdf7.Objects;
using WebSupergoo.ABCpdf7.Atoms;
using WebSupergoo.ABCpdf7.Operations;

namespace CSBconvert
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        public void exitApplication(Object sender, EventArgs e)
        {
            Application.Exit();
        }

        private void btnPDFLoc_Click(object sender, EventArgs e)
        {
            if (openFD.ShowDialog() == DialogResult.OK)
            {
                txtPDFLoc.Text = openFD.SelectedPath.ToString();
            }
        }

        private void btnOutput_Click(object sender, EventArgs e)
        {
            if (openFD.ShowDialog() == DialogResult.OK)
            {
                txtOutput.Text = openFD.SelectedPath.ToString();
            }
        }

        private void btnProcess_Click(object sender, EventArgs e)
        {
            string filePath = txtPDFLoc.Text + "\\";
            string savePath = txtOutput.Text;
            string fileName;
            DirectoryInfo directoryList = new DirectoryInfo(@filePath);
            FileInfo[] pdfFile = directoryList.GetFiles("*.pdf");
            foreach (FileInfo file in pdfFile)
            {
                Doc theDoc = new Doc();
                
                theDoc.Read(filePath + file.Name);

                // set up the rendering parameters

                theDoc.Rendering.ColorSpace = "Gray";
                theDoc.Rendering.BitsPerChannel = 1;
                theDoc.Rendering.DotsPerInchX = 200;
                theDoc.Rendering.DotsPerInchY = 400;
                // loop through the pages
                int n = theDoc.PageCount;
                fileName = Path.GetFileNameWithoutExtension(file.FullName);
                for (int i = 1; i <= n; i++)
                {
                    theDoc.PageNumber = i;
                    theDoc.Rect.String = theDoc.CropBox.String;
                    theDoc.Rendering.SaveAppend = (i != 1);
                    //theDoc.Rendering.SaveCompression = XRendering.Compression.G4;
                    theDoc.SetInfo(0, "ImageCompression", "4");

                    theDoc.Rendering.Save(savePath + "\\" + fileName + ".tiff");              
                }

                theDoc.Clear();
                
            }
        }
    }
}