PDF-Merge/ConfForm.cs

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

namespace PDF_Merge
{
    public partial class ConfForm : Form
    {
        public ConfForm()
        {
            InitializeComponent();

            string sourcePath = ConfigurationManager.AppSettings["PDF-Path"];
            string outputPath = ConfigurationManager.AppSettings["PDF-Output"];

            sourceBox.Text = sourcePath;
            outputBox.Text = outputPath;
            if (ConfigurationManager.AppSettings["overwrite"] == true.ToString())
            {
                overrideCBox.Checked = true;
            }
            else
            {
                overrideCBox.Checked = false;
            }
        }

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

        private void saveBtn_Click(object sender, EventArgs e)
        {
            Configuration appConfig = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
            AppSettingsSection appSettings = appConfig.AppSettings;
            if (sourceBox.Text.Length > 0)
            {
                appSettings.Settings["PDF-Path"].Value = sourceBox.Text;
            }
            else
            {
                MessageBox.Show("Source path cannot be empty.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
            if (outputBox.Text.Length > 0)
            {
                appSettings.Settings["PDF-Output"].Value = outputBox.Text;
            }
            else
            {
                MessageBox.Show("Output path cannot be empty.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
            appSettings.Settings["overwrite"].Value = overrideCBox.Checked.ToString();
            appConfig.Save(ConfigurationSaveMode.Modified);
            ConfigurationManager.RefreshSection("appSettings");
            this.Close();
        }

        private void sourceDirBtn_Click(object sender, EventArgs e)
        {
            using (var SourceDirPicker = new FolderBrowserDialog())
            {
                if(SourceDirPicker.ShowDialog() == DialogResult.OK)
                {
                    var sourceDir = SourceDirPicker.SelectedPath;
                    sourceBox.Text = sourceDir;
                }
            }
        }
    }
}