public static ProgramArguments Create(string[] args)
{
// Using a static creation function for a command line arguments class is not required, but it's a convenient
// way to place all command-line related functionality in one place. To parse the arguments (eg. from the Main method)
// you then only need to call this function.
CommandLineParser parser = new CommandLineParser(typeof(ProgramArguments));
ProgramArguments result = null;
bool showFullHelp = false;
try
{
// The Parse function returns null only when the ArgumentParsed event handler cancelled parsing.
result = (ProgramArguments)parser.Parse(args);
showFullHelp = result.Help;
if (result.Help)
{
showFullHelp = false;
switch (result.Command)
{
case Command.Add:
Console.WriteLine("Help specific to Add command here.");
break;
case Command.Delete:
Console.WriteLine("Help specific to Delete command here.");
break;
case Command.Update:
Console.WriteLine("Help specific to Update command here.");
break;
default:
showFullHelp = true;
break;
}
}
}
catch (CommandLineArgumentException ex)
{
// We use the LineWrappingTextWriter to neatly wrap console output.
using (LineWrappingTextWriter writer = LineWrappingTextWriter.ForConsoleError())
{
// Tell the user what went wrong.
writer.WriteLine(ex.Message);
writer.WriteLine();
}
}
if (showFullHelp)
{
// If we got here, we should print usage information to the console.
// By default, aliases and default values are not included in the usage descriptions; for this sample, I do want to include them.
WriteUsageOptions options = new WriteUsageOptions()
{
IncludeDefaultValueInDescription = true, IncludeAliasInDescription = true
};
// WriteUsageToConsole automatically uses a LineWrappingTextWriter to properly word-wrap the text.
parser.WriteUsageToConsole(options);
}
return(result);
}
