Source code for wpd.cs

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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Linq;
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using System.IO;
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using System.Windows.Forms;
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namespace RobvanderWoude
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{
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    static class WPD
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    {
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        /// <summary>
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        /// The main entry point for the application.

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        /// </summary>
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        [STAThread]
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        static void Main()
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        {
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            int exitcode = 1;
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            Application.EnableVisualStyles( );

            Application.SetCompatibleTextRenderingDefault( false );

            string[] arguments = System.Environment.GetCommandLineArgs( ).Skip( 1 ).ToArray( );

            if ( arguments.Length == 1 )

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            {
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                if ( arguments[0] == "/?" )

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                {
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                    string message = "WPD.exe, Version 1.00\n";

                    message += "Open a Word document with identical name and location\n";

                    message += "when doubeclicking a WordPerfect document\n\n";

                    message += "Usage:\n";

                    message += "  *\tRegister this program for WordPerfect files (*.wpd)\n";

                    message += "  *\tWhenever you doubleclick a WordPerfect file, this\n";

                    message += "   \tprogram will search for a Word document with the\n";

                    message += "   \tsame name and location, and open that Word\n";

                    message += "   \tdocument instead.\n";

                    message += "  *\tIf more than one matching Word file exists\n";

                    message += "   \t(e.g. *.doc as well as *.docx), a popup message\n";

                    message += "   \twill tell you to select the Word document directly.\n\n";

                    message += "Return code for this program is 0 if a single matching Word\n";

                    message += "document was found and opened, otherwise 1.\n\n";

                    message += "Written by Rob van der Woude\n";

                    message += "https://www.robvanderwoude.com";

                    string title = "Help for WPD.exe";

                    MessageBox.Show( message, title );

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                }
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                else
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                {
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                    string ext = Path.GetExtension( arguments[0].ToLower( ) );

                    string workingdir = Directory.GetParent( arguments[0] ).FullName;

                    string basename = Path.GetFileNameWithoutExtension( arguments[0] );

                    if ( ext.Substring( 0, 3 ) == ".wp" )

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                    {
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                        List<string> docfiles = Directory.GetFiles( workingdir, basename + ".doc*" ).ToList<string>( );

                        switch ( docfiles.Count )

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                        {
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                            case 1:
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                                try
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                                {
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                                    _ = Process.Start( new ProcessStartInfo( docfiles[0] ) );

                                    exitcode = 0;

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                                }
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                                catch
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                                {
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                                    // ignore, exit code will be 1

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                                }
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                                break;
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                            default:
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                                MessageBox.Show( string.Format( "There are {0} files matching \"{1}.doc*\"", docfiles.Count, Path.Combine( workingdir, basename ) ), "Ambiguity" );

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                                break;
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                        }
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                    }
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                }
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            }
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            Environment.ExitCode = exitcode;

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        }
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    }
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}
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