System.CommandLine 参数未传递给处理程序

Question

我正在努力掌握 System.CommandLine。

我可以在命令行上解析布尔选项，例如 -x 并且我可以传递字符串选项，例如 -f myfile 但是我遇到的问题是可以选择传递的字符串参数到程序 - 不是一个选项。

解析器在某种程度上理解了参数。如果我在命令行上提供零个或一个字符串，则不会出现错误。如果我提供额外的字符串，则会收到错误“无法识别的命令或参数”。但是，在处理程序中，参数始终为空。即使我指定了默认值并且未将字符串标记为可为空。

我正在使用的沙坑代码如下。谁能建议我做错了什么？我在其他地方发现了很多关于选项的讨论，但关于参数的讨论却很少。

using System.CommandLine;
using System.CommandLine.IO;
using System.CommandLine.NamingConventionBinder;

namespace ConsoleApp1
{
    public static class Program
    {
        public static int Main(string[] args)
        {

            RootCommand _cmd = new()
             {
                 new Option<bool>(new[] { "--immediatecalc", "-c" }, () => { return false; }, "Automatically run calculations when a file is loaded"),
                 new Option<bool>(new[] { "--autoexit", "-x" }, () => { return false; }, "Exit after carrying out directed tasks"),
                 new Option<bool>(new[] { "--saveJSON", "-s" }, () => { return false; }, "Export on deck JSON file after calculating"),
                 new Option<string?>(new[] { "--JSONfile", "-f" }, () => { return null; }, "File name for exported JSON file"),
                 new Argument<string?>("Filename", () => { return null; }, "The file to load.")
            };

            _cmd.Handler = CommandHandler.Create<bool, bool, bool, string?, string?, IConsole>(Handler);

            return _cmd.Invoke(args);
        }
        static void Handler(bool immediatecalc, bool autoexit, bool saveJSON, string? jsonFile, string? sourceFile, IConsole console)
        {
            console.WriteLine("Immediate calc " + immediatecalc);
            console.WriteLine("Autoexit " + autoexit);
            console.WriteLine("saveJSON " + saveJSON);
            console.WriteLine("Json file is " + jsonFile);
            console.WriteLine("Source file is " + sourceFile);
        }
    }
}

Answer 1

这就是我使用最新的 System.CommandLine 版本 2.0.0-beta3.22114.1

进行设置的方式

using System.CommandLine;

namespace ConsoleApp1
{
    public static class Program
    {
        public static int Main(string[] args)
        {

            var immediateCalcOption = new Option<bool>(new[] { "--immediatecalc", "-c" }, () => { return false; }, "Automatically run calculations when a file is loaded");
            var autoExitOption = new Option<bool>(new[] { "--autoexit", "-x" }, () => { return false; }, "Exit after carrying out directed tasks");
            var saveJsonOption = new Option<bool>(new[] { "--saveJSON", "-s" }, () => { return false; }, "Export on deck JSON file after calculating");
            var jsonFileOption = new Option<string?>(new[] { "--JSONfile", "-f" }, () => { return null; }, "File name for exported JSON file");
            var fileNameArgument = new Argument<string?>("Filename", () => { return null; }, "The file to load.");
            RootCommand _cmd = new()
            {
                immediateCalcOption,
                autoExitOption,
                saveJsonOption,
                jsonFileOption,
                fileNameArgument
            };

            _cmd.SetHandler<bool, bool, bool, string?, string?, IConsole>(Handler, immediateCalcOption, autoExitOption, saveJsonOption, jsonFileOption, fileNameArgument);

            return _cmd.Invoke(args);
        }
        static void Handler(bool immediatecalc, bool autoexit, bool saveJSON, string? jsonFile, string? sourceFile, IConsole console)
        {
            console.WriteLine("Immediate calc " + immediatecalc);
            console.WriteLine("Autoexit " + autoexit);
            console.WriteLine("saveJSON " + saveJSON);
            console.WriteLine("Json file is " + jsonFile);
            console.WriteLine("Source file is " + sourceFile);
        }
    }
}

这对我有用 args 输入 filename -c -x -s -f hello 给了我这个输出

Immediate calc True
Autoexit True
saveJSON True
Json file is hello
Source file is filename

System.CommandLine 参数未传递给处理程序

System.CommandLine argument not being passed to handler

c#

system.commandline