一个非常简单易于使用的命令行解析专用类，它支持默认参数。

class CommandLineArgs
{
    public static CommandLineArgs I
    {
        get
        {
            return m_instance;
        }
    }

    public  string argAsString( string argName )
    {
        if (m_args.ContainsKey(argName)) {
            return m_args[argName];
        }
        else return "";
    }

    public long argAsLong(string argName)
    {
        if (m_args.ContainsKey(argName))
        {
            return Convert.ToInt64(m_args[argName]);
        }
        else return 0;
    }

    public double argAsDouble(string argName)
    {
        if (m_args.ContainsKey(argName))
        {
            return Convert.ToDouble(m_args[argName]);
        }
        else return 0;
    }

    public void parseArgs(string[] args, string defaultArgs )
    {
        m_args = new Dictionary<string, string>();
        parseDefaults(defaultArgs );

        foreach (string arg in args)
        {
            string[] words = arg.Split('=');
            m_args[words[0]] = words[1];
        }
    }

    private void parseDefaults(string defaultArgs )
    {
        if ( defaultArgs == "" ) return;
        string[] args = defaultArgs.Split(';');

        foreach (string arg in args)
        {
            string[] words = arg.Split('=');
            m_args[words[0]] = words[1];
        }
    }

    private Dictionary<string, string> m_args = null;
    static readonly CommandLineArgs m_instance = new CommandLineArgs();
}

class Program
{
    static void Main(string[] args)
    {
        CommandLineArgs.I.parseArgs(args, "myStringArg=defaultVal;someLong=12");
        Console.WriteLine("Arg myStringArg  : '{0}' ", CommandLineArgs.I.argAsString("myStringArg"));
        Console.WriteLine("Arg someLong     : '{0}' ", CommandLineArgs.I.argAsLong("someLong"));
    }
}

看看http://github.com/mono/mono/tree/master/mcs/class/Mono.Options/

我最近遇到了FubuCore命令行解析实现，我真的很喜欢它，原因是:

it's easy to use - although I couldn't find a documentation for it, the FubuCore solution also provides a project containing a nice set of Unit Tests that speak more about the functionality than any documentation could it has a nice object oriented design, no code repetition or other such things that I used to have in my command line parsing apps it's declarative: you basically write classes for the Commands and sets of parameters and decorate them with attributes to set various options (e.g. name, description, mandatory/optional) the library even prints a nice Usage Graph, based on these definitions

下面是一个简单的例子说明如何使用它。为了说明用法，我写了一个简单的实用程序，它有两个命令: - add(将一个对象添加到列表中-一个对象由一个名称(字符串)，值(int)和一个布尔标志组成) - list(列出当前添加的所有对象)

首先，我为'add'命令写了一个Command类:

[Usage("add", "Adds an object to the list")]
[CommandDescription("Add object", Name = "add")]
public class AddCommand : FubuCommand<CommandInput>
{
    public override bool Execute(CommandInput input)
    {
        State.Objects.Add(input); // add the new object to an in-memory collection

        return true;
    }
}

这个命令接受一个commandput实例作为参数，所以我下面定义它:

public class CommandInput
{
    [RequiredUsage("add"), Description("The name of the object to add")]
    public string ObjectName { get; set; }

    [ValidUsage("add")]
    [Description("The value of the object to add")]
    public int ObjectValue { get; set; }

    [Description("Multiply the value by -1")]
    [ValidUsage("add")]
    [FlagAlias("nv")]
    public bool NegateValueFlag { get; set; }
}

下一个命令是'list'，实现如下:

[Usage("list", "List the objects we have so far")]
[CommandDescription("List objects", Name = "list")]
public class ListCommand : FubuCommand<NullInput>
{
    public override bool Execute(NullInput input)
    {
        State.Objects.ForEach(Console.WriteLine);

        return false;
    }
}

'list'命令不带参数，所以我定义了一个NullInput类:

public class NullInput { }

现在剩下的就是在Main()方法中把它连接起来，就像这样:

    static void Main(string[] args)
    {
        var factory = new CommandFactory();
        factory.RegisterCommands(typeof(Program).Assembly);

        var executor = new CommandExecutor(factory);

        executor.Execute(args);
    }

程序按预期工作，在任何命令无效的情况下打印正确用法的提示:

  ------------------------
    Available commands:
  ------------------------
     add -> Add object
    list -> List objects
  ------------------------

下面是'add'命令的用法示例:

Usages for 'add' (Add object)
  add <objectname> [-nv]

  -------------------------------------------------
    Arguments
  -------------------------------------------------
     objectname -> The name of the object to add
    objectvalue -> The value of the object to add
  -------------------------------------------------

  -------------------------------------
    Flags
  -------------------------------------
    [-nv] -> Multiply the value by -1
  -------------------------------------

我喜欢这个，因为你可以为参数“定义规则”，不管是否需要，……

或者如果你是一个Unix的家伙，那么你可能会喜欢GNU Getopt . net端口。

c# CLI是我编写的一个非常简单的命令行参数解析库。它是有据可查的开源软件。

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.