PDF-Merge/MainForm.cs

using System.Configuration;

namespace PDF_Merge
{
    public partial class MainForm : Form
    {
        
        public MainForm()
        {
            InitializeComponent();
            SetPathLable();
        }
        private static string getOutputPath()
        {
            string pdfPath = ConfigurationManager.AppSettings["PDF-Output"] + Path.DirectorySeparatorChar + ConfigurationManager.AppSettings["PDF-Name"];
            return pdfPath;
        }
        public void SetPathLable()
        {
            string sourcePath = ConfigurationManager.AppSettings["PDF-Path"];
            
            if (sourcePath != null)
            {
                if (sourcePath != "")
                {
                    if (Directory.Exists(sourcePath))
                    {
                        srcPathLable.Text = "Source Path: " + sourcePath;
                    }
                    else
                    {
                        srcPathLable.Text = "The configured path does not exist.";
                    }
                }
                else
                {
                    srcPathLable.Text = "The configured path is blank.";
                }
            }
            else
            {
                srcPathLable.Text = "No path has been configured.";
            }
            outputLable.Text = "Output Path: " + getOutputPath();
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void button1_Click(object sender, EventArgs e)
        {
            string[] pdf_files = MergePDFs.CollectPdfFiles();
            
            MergePDFs.MergePdfFiles(pdf_files, getOutputPath());
        }

        private void exitToolStripMenuItem_Click(object sender, EventArgs e)
        {
            Environment.Exit(0);
        }

        private void aboutToolStripMenuItem_Click(object sender, EventArgs e)
        {
            AboutBox1 AboutWindow = new AboutBox1();
            AboutWindow.Show();
        }

        private void configureToolStripMenuItem_Click(object sender, EventArgs e)
        {
            ConfForm ConfForm = new ConfForm();
            ConfForm.Show();
        }
        private void MainForm_Activated(object sender, EventArgs e)
        {
            SetPathLable();
        }
    }
}