从C中的组件构建目录字符串#

C#是否支持方法中的无限参数?

是的,请查看params关键字。将使编写只调用Path的函数变得简单。组合适当的次数,如下所示(未测试):

string CombinePaths(params string[] parts) {
    string result = String.Empty;
    foreach (string s in parts) {
        result = Path.Combine(result, s);
    }
    return result;
}

Aggregate 扩展功能可以用来实现您想要的功能。考虑这个例子:

string[] ary = new string[] { "c:\\", "Windows", "System" };
string path = ary.Aggregate((aggregation, val) => Path.Combine(aggregation, val));
Console.WriteLine(path); //outputs c:\Windows\System

我更喜欢使用DirectoryInfo而不是DirectoryInfo上的静态方法,因为我认为这是更好的面向对象设计。下面是一个使用DirectoryInfo+扩展方法的解决方案,我认为它非常好用:

    public static DirectoryInfo Subdirectory(this DirectoryInfo self, params string[] subdirectoryName)
    {
        Array.ForEach(
            subdirectoryName, 
            sn => self = new DirectoryInfo(Path.Combine(self.FullName, sn))
            );
        return self;
    }

我不喜欢我正在改变的事实 self

        DirectoryInfo di = new DirectoryInfo("C:\\")
            .Subdirectory("Windows")
            .Subdirectory("System32");

        DirectoryInfo di2 = new DirectoryInfo("C:\\")
            .Subdirectory("Windows", "System32");

public static string CreateDirectoryName(string fileName, params string[] folders)
{
    if(folders == null || folders.Length <= 0)
    {
        return fileName;
    }

    string directory = string.Empty;
    foreach(string folder in folders)
    {
        directory = System.IO.Path.Combine(directory, folder);
    }
    directory = System.IO.Path.Combine(directory, fileName);

    return directory;
}

params使您可以附加无限多的字符串。

Combine的作用是确保输入的字符串不以斜杠开头或结尾,并检查是否有任何无效字符。