<< Click to Display Table of Contents >> Navigation:  Create a PDF Editor > .NET (C#) Example > Extract Attachments

To extract attachments of a PDF we have added a menu item to the "Info" menu. This menu item will get a drop down with all attachment names in the current document.

 

This event is triggered when the "Info" menu drops down:

 

private void infoToolStripMenuItem_DropDownOpening(object sender, EventArgs e)

{

    menFileattachment.DropDownItems.Clear();

    int j = pdfViewer1.Command(commands.COMPDF_Attachment_List);

    for(int i = 0; i<j;i++)

    {

 System.Windows.Forms.ToolStripMenuItem men = new System.Windows.Forms.ToolStripMenuItem();

 men.Text = pdfViewer1.CommandGetStr( commands.COMPDF_Attachment_GetProp, "", i );

 men.Tag = i;

 men.Click += new System.EventHandler(OnClickAttachment);

 menFileattachment.DropDownItems.Add(men);

    }

    if(j<=0) menFileattachment.DropDownItems.Add("<empty>").Enabled = false;

 

}

 

This event handles the click on any of the attachment menu items to save the attachment to a file.

 

private void OnClickAttachment(object sender, EventArgs e)

{

    System.Windows.Forms.ToolStripMenuItem men = sender as System.Windows.Forms.ToolStripMenuItem;

    int l = pdfViewer1.Command(commands.COMPDF_Attachment_GetData, (int)men.Tag);

    if (l > 0)

    {

byte[] databytes = pdfViewer1.GetMemory();

 saveFileDialog1.FileName = men.Text;

if ( saveFileDialog1.ShowDialog()==System.Windows.Forms.DialogResult.OK )

 {

     System.IO.FileStream file = new System.IO.FileStream(saveFileDialog1.FileName,  System.IO.FileMode.Create );

     file.Write(databytes,0,databytes.Length);

     file.Close();

 }

    }

}