CLI 2

Program-2.cs

#region convert-command
app.Command("convert",
	(convert) =>
	{
		var outputOption = convert.Option("-o|--output", "Output File"
			, CommandOptionType.SingleValue);

		var firstRowOption = convert.Option("-f|--first-row-header", "First row as header"
			, CommandOptionType.NoValue);

		convert.HelpOption("-? | -h | --help");

		convert.OnExecute(() =>
		{
			if (verboseOption.HasValue())
				Console.WriteLine($"Init process file {inputFileOption.ParsedValue}.");

			var inputFile = GetInputFile(inputFileOption);

			var outputFile = outputOption.Value()
				?? Path.GetFileNameWithoutExtension(inputFile);

			if (verboseOption.HasValue() && firstRowOption.HasValue())
				Console.WriteLine("Find first row as header.");

			if (verboseOption.HasValue())
				Console.WriteLine($"Convert to {outputFile}.xlsx");

			// do the conversation!
		});

	}
);
#endregion convert-command

#region print-command
app.Command("print", (print) =>
{
	var tailOptions = print.Option<bool>("-t|--tail", "Show n rows from the tail."
		, CommandOptionType.NoValue);

	var rowOption = print.Option<int>("-r|--rows",
		"Number of rows to show", CommandOptionType.SingleValue);

	print.HelpOption("-? | -h | --help");

	print.OnExecute(() =>
	{
		var inputFile = GetInputFile(inputFileOption);

		// Zero = all rows
		var rows = rowOption.HasValue() ? Math.Abs(rowOption.ParsedValue) : 0;

		if (verboseOption.HasValue())
			Console.WriteLine(tailOptions.HasValue() && rows > 0
				? $"Print {rows} records from the tail."
				: $"Print {rows} records from the top.");

		// print file
		Console.WriteLine("print.");
	});
});
#endregion