How to Efficiently Parse Command-Line Arguments in C#?

The efficient analysis method of the line parameters of the command line

When developing a console application that accepts command line parameters, it is important to effectively use parameters passed to

. Many developers initially used indexes and circulating technical processing parameters. However, as the command structure becomes more and more complicated, this method will cause the code to become awkward.

Main(string[] args) In order to cope with this challenge, exploring effective libraries and models is very important:

Library:

NDESK.OUPTIONS:

Provides a set of comprehensive options for convenient and powerful parameter analysis. Its smooth API simplifies the definition of analysis rules, and provides options for displaying help information.

• Mono.Options: Has the same API as ndesk.options, providing compatible options for Mono -based environments.
• ndesk.Options use example:
The following code fragments demonstrate how to use ndesk.Options to parse the command line parameters:

This code defines four options:

: Accept the string parameters and add it to the names list.

bool show_help = false;
List<string> names = new List<string>();
int repeat = 1;

var p = new OptionSet()
{
    { "n|name=", "问候对象的姓名。", v => names.Add(v) },
    { "r|repeat=", "重复问候的次数（必须为整数）。", (int v) => repeat = v },
    { "v", "提高调试消息的详细程度", v => { if (v != null) ++verbosity; } },
    { "h|help", "显示此消息并退出", v => show_help = v != null }
};

List<string> extra;
try
{
    extra = p.Parse(args);
}
catch (OptionException e)
{
    Console.Write("greet: ");
    Console.WriteLine(e.Message);
    Console.WriteLine("尝试 `greet --help` 获取更多信息。");
    return;
}

: Accept the integer parameter and assign it to the Repeat variable.

: If specified, the Verbosity variable is increased (no value).

1. : Show helping information and exit the application. "n|name="
2. By providing a flexible and good parameter analysis method, these libraries can significantly enhance the maintenance and readability of the code. "r|repeat="

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