C# code to count number of page in PDF file

CODE::
 

using System.IO;

using System.Text.RegularExpressions;

  

Drag one label, two buttons, one fileOpenDialog object and one textbox on the form.

Now write following code on form Load event

private void Form1_Load(object sender, EventArgs e)

        {

            this.Text = "DevAsp PDF Page Counter";

            button1.Text = "Browse";

            button2.Text = "Count Pages";

        }

 

Now write code on buttons events

private void button2_Click(object sender, EventArgs e)

        {

            MessageBox.Show(GetNoOfPagesPDF(textBox1.Text).ToString());

        }

  

private void button1_Click(object sender, EventArgs e)

        {

            if (openFileDialog1.ShowDialog() == DialogResult.OK)

            {

                textBox1.Text = openFileDialog1.FileName;

            }

        }

Now this is the function which count pages of PDF

 

public static int GetNoOfPagesPDF(string FileName)

        {

            int result = 0;

            FileStream fs = new FileStream(FileName, FileMode.Open, FileAccess.Read);

 

            StreamReader r = new StreamReader(fs);

 

            string pdfText = r.ReadToEnd();

 

            System.Text.RegularExpressions.Regex regx = new Regex(@"/Type\s*/Page[^s]");

 

            System.Text.RegularExpressions.MatchCollection matches = regx.Matches(pdfText);

            result = matches.Count;

             return result;

        }

  

In this funciton we are opening PDF file. and then using aDoc. Regex(@"/Type\s*/Page[^s]"); function we count total pages of PDF file.