在构建接受参数的控制台应用程序时,可以使用传递给Main的参数(string[] args)。

在过去,我只是简单地索引/循环该数组,并做了一些正则表达式来提取值。然而,当命令变得更加复杂时,解析就会变得非常糟糕。

我感兴趣的是:

你使用的库 你使用的模式

假设命令总是遵循常见的标准,比如这里回答的。


当前回答

我个人最喜欢的是Peter palota的http://www.codeproject.com/KB/recipes/plossum_commandline.aspx:

[CommandLineManager(ApplicationName="Hello World",
    Copyright="Copyright (c) Peter Palotas")]
class Options
{
   [CommandLineOption(Description="Displays this help text")]
   public bool Help = false;

   [CommandLineOption(Description = "Specifies the input file", MinOccurs=1)]
   public string Name
   {
      get { return mName; }
      set
      {
         if (String.IsNullOrEmpty(value))
            throw new InvalidOptionValueException(
                "The name must not be empty", false);
         mName = value;
      }
   }

   private string mName;
}

其他回答

Genghis命令行解析器可能有点过时,但它的功能非常完整,对我来说工作得很好。

这个问题有很多解决方案。为了完整性和提供替代方案,如果有人需要,我在我的谷歌代码库中添加了两个有用的类的答案。

第一个是ArgumentList,它只负责解析命令行参数。它收集由开关'/x:y'或'-x=y'定义的名值对,还收集'未命名'条目列表。它的基本用法在这里讨论,查看类在这里。

第二部分是CommandInterpreter,它从. net类中创建一个功能齐全的命令行应用程序。举个例子:

using CSharpTest.Net.Commands;
static class Program
{
    static void Main(string[] args)
    {
        new CommandInterpreter(new Commands()).Run(args);
    }
    //example ‘Commands’ class:
    class Commands
    {
        public int SomeValue { get; set; }
        public void DoSomething(string svalue, int ivalue)
        { ... }

使用上面的示例代码,您可以运行以下代码:

exe DoSomething“字符串值

——或——

Program.exe dosomething /ivalue=5 -svalue:"字符串值"

它就是这么简单,也有你想要的那么复杂。您可以查看源代码、查看帮助或下载二进制文件。

我非常喜欢命令行解析器库(http://commandline.codeplex.com/)。它有一个非常简单和优雅的方式来通过属性设置参数:

class Options
{
    [Option("i", "input", Required = true, HelpText = "Input file to read.")]
    public string InputFile { get; set; }

    [Option(null, "length", HelpText = "The maximum number of bytes to process.")]
    public int MaximumLenght { get; set; }

    [Option("v", null, HelpText = "Print details during execution.")]
    public bool Verbose { get; set; }

    [HelpOption(HelpText = "Display this help screen.")]
    public string GetUsage()
    {
        var usage = new StringBuilder();
        usage.AppendLine("Quickstart Application 1.0");
        usage.AppendLine("Read user manual for usage instructions...");
        return usage.ToString();
    }
}

我个人最喜欢的是Peter palota的http://www.codeproject.com/KB/recipes/plossum_commandline.aspx:

[CommandLineManager(ApplicationName="Hello World",
    Copyright="Copyright (c) Peter Palotas")]
class Options
{
   [CommandLineOption(Description="Displays this help text")]
   public bool Help = false;

   [CommandLineOption(Description = "Specifies the input file", MinOccurs=1)]
   public string Name
   {
      get { return mName; }
      set
      {
         if (String.IsNullOrEmpty(value))
            throw new InvalidOptionValueException(
                "The name must not be empty", false);
         mName = value;
      }
   }

   private string mName;
}

看起来每个人都有自己的宠物命令行解析器,我最好也添加我的:)。

http://bizark.codeplex.com/

这个库包含一个命令行解析器,它将使用命令行中的值初始化一个类。它有很多功能(我已经建立了很多年了)。

从文档中…

怪诞框架中的命令行解析具有以下关键特性:

Automatic initialization: Class properties are automatically set based on the command-line arguments. Default properties: Send in a value without specifying the property name. Value conversion: Uses the powerful ConvertEx class also included in BizArk to convert values to the proper type. Boolean flags: Flags can be specified by simply using the argument (ex, /b for true and /b- for false) or by adding the value true/false, yes/no, etc. Argument arrays: Simply add multiple values after the command-line name to set a property that is defined as an array. Ex, /x 1 2 3 will populate x with the array { 1, 2, 3 } (assuming x is defined as an array of integers). Command-line aliases: A property can support multiple command-line aliases for it. For example, Help uses the alias ?. Partial name recognition: You don’t need to spell out the full name or alias, just spell enough for the parser to disambiguate the property/alias from the others. Supports ClickOnce: Can initialize properties even when they are specified as the query string in a URL for ClickOnce deployed applications. The command-line initialization method will detect if it is running as ClickOnce or not so your code doesn’t need to change when using it. Automatically creates /? help: This includes nice formatting that takes into account the width of the console. Load/Save command-line arguments to a file: This is especially useful if you have multiple large, complex sets of command-line arguments that you want to run multiple times.