frmSettings.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;


namespace PDFEncrypt
{
	public partial class frmSettings : Form
	{
		public frmSettings()
		{
			InitializeComponent();
		}

		private void frmSettings_Load(object sender, EventArgs e)
		{
			// Show program version
			lblVersion.Text = "Version: " + System.Reflection.Assembly.GetExecutingAssembly().GetName().Version.ToString();

			// Load encryption types: (Thanks https://stackoverflow.com/a/11745699/1502289)
			Dictionary<int, string> encryption_types = new Dictionary<int, string>
			{
				{ (int)Settings.EncryptionType.AES_256, "AES-256 (Adobe Reader 8+) [recommended]" },
				{ (int)Settings.EncryptionType.AES_128, "AES-128 (Adobe Reader 7+" },
				{ (int)Settings.EncryptionType.RC4_128, "RC4-128 (Adobe Reader 6+)" },
				{ (int)Settings.EncryptionType.RC4_40, "RC4-40 (Adobe Reader 3+) [not recommended]" }
			};

			// Attach datasource to combo box.
			cboEncryptionType.DataSource = new BindingSource(encryption_types, null);
			cboEncryptionType.DisplayMember = "Value";
			cboEncryptionType.ValueMember = "Key";
		
			// Load settings:
			Settings.load();    // Load settings from registry.

			// Populate settings to form controls
			chkRun.Checked = Settings.run_after;
			txtRun.Text = Settings.run_after_file;
			txtArguments.Text = Settings.run_after_arguments;
			chkPasswordConfirmation.Checked = Settings.password_confirm;
			chkCloseAfterCompletion.Checked = Settings.close_after;
			chkShowFolder.Checked = Settings.show_folder_after;
			chkOpen.Checked = Settings.open_after;

			// Encryption options:
			cboEncryptionType.SelectedIndex = cboEncryptionType.FindStringExact(encryption_types[(int)Settings.encryption_type]);
			chkEncryptMetadata.Checked = Settings.encrypt_metadata;
			chkPrinting.Checked = Settings.allow_printing;
			chkDegradedPrinting.Checked= Settings.allow_degraded_printing;
			chkModifying.Checked = Settings.allow_modifying;
			chkNotations.Checked = Settings.allow_modifying_annotations;
			chkCopying.Checked = Settings.allow_copying;
			chkForms.Checked = Settings.allow_form_fill;
			chkAssembly.Checked = Settings.allow_assembly;
			chkScreenreaders.Checked = Settings.allow_screenreaders;

		}

		private void chkRun_CheckedChanged(object sender, EventArgs e)
		{
			txtRun.Enabled = chkRun.Checked;
			btnRunBrowse.Enabled = chkRun.Checked;
		}

		private void btnRunBrowse_Click(object sender, EventArgs e)
		{
			var result = dlgOpen.ShowDialog();
			if(result == DialogResult.Cancel) { return; }
			txtRun.Text = dlgOpen.FileName;
		}

		private void btnOK_Click(object sender, EventArgs e)
		{
            // Save settings

            // Validate RUN file
            if (chkRun.Checked)
            {
                if (!File.Exists(txtRun.Text))
                {
                    MessageBox.Show("The file to run does not exist.");
                    txtRun.Focus();
                    txtRun.SelectAll();
                    return;
                }
            }

            // Save settings
            Settings.run_after = chkRun.Checked;
			Settings.run_after_file = txtRun.Text;
			Settings.run_after_arguments = txtArguments.Text;
			Settings.password_confirm = chkPasswordConfirmation.Checked;
			Settings.close_after = chkCloseAfterCompletion.Checked;
			Settings.show_folder_after = chkShowFolder.Checked;
			Settings.open_after = chkOpen.Checked;
			
			// Encryption options
			Settings.encryption_type = (Settings.EncryptionType)cboEncryptionType.SelectedValue;
			Settings.encrypt_metadata = chkEncryptMetadata.Checked;
			Settings.allow_printing = chkPrinting.Checked;
			Settings.allow_degraded_printing = chkDegradedPrinting.Checked;
			Settings.allow_modifying = chkModifying.Checked;
			Settings.allow_modifying_annotations = chkNotations.Checked;
			Settings.allow_copying = chkCopying.Checked;
			Settings.allow_form_fill = chkForms.Checked;
			Settings.allow_assembly = chkAssembly.Checked;
			Settings.allow_screenreaders = chkScreenreaders.Checked;

			Settings.save();

			// Close settings window
			this.Close();
		}

		private void btnCancel_Click(object sender, EventArgs e)
		{
			this.Close();
		}

		private void lblVisitSite_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
		{
			System.Diagnostics.Process.Start("https://pdfencrypt.net");
		}

        private void chkRun_CheckedChanged_1(object sender, EventArgs e)
        {

        }

        private void linkDonate_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
			System.Diagnostics.Process.Start("https://www.paypal.com/donate?hosted_button_id=KBE8SENS5JCSG");
        }
    }
}