Compress PDF File Size in ASP.Net using C# and VB.Net

Hi salini,

Refer the below sample code. I have created sample using iTextsharp library.

HTML

<asp:FileUpload ID="fuUpload" runat="server" />
<asp:Button Text="Compress" runat="server" OnClick="Compress" />

C#

using iTextSharp.text;
using iTextSharp.text.pdf;
using System.IO;

protected void Compress(object sender, EventArgs e)
{
    if (fuUpload.HasFile)
    {
        if (fuUpload.PostedFile.ContentLength > 0)
        {
            string pdfFile = fuUpload.PostedFile.FileName;
            PdfReader reader = new PdfReader(pdfFile);
            PdfStamper stamper = new PdfStamper(reader, new FileStream(@"C:\Users\dharmendra\Desktop\test1.pdf", FileMode.Create), PdfWriter.VERSION_1_5);
            stamper.FormFlattening = true;
            stamper.SetFullCompression();
            stamper.Close();
        }
    }
}

VB.Net

Imports iTextSharp.text
Imports iTextSharp.text.pdf
Imports System.IO

Protected Sub Compress(sender As Object, e As EventArgs)
	If fuUpload.HasFile Then
		If fuUpload.PostedFile.ContentLength > 0 Then
			Dim pdfFile As String = fuUpload.PostedFile.FileName
			Dim reader As New PdfReader(pdfFile)
			Dim stamper As New PdfStamper(reader, New FileStream("C:\Users\dharmendra\Desktop\test1.pdf", FileMode.Create), PdfWriter.VERSION_1_5)
			stamper.FormFlattening = True
			stamper.SetFullCompression()
			stamper.Close()
		End If
	End If
End Sub