System.String.Split(null)不会删除空格(C#)

Question

我知道System.String.Split(null)应该返回一个删除了空格的字符串数组.我已经阅读了这篇文章和这篇MSDN文档,它与我所遇到的内容不一致.

这是我的代码:

void MyFunction(string info)
{
    print(info);
    print(Char.IsWhiteSpace(info,0));
    print(Char.IsWhiteSpace(info,1));
    print(Char.IsWhiteSpace(info,2));
    print(Char.IsWhiteSpace(info,3));
    print(Char.IsWhiteSpace(info,4));
    print(Char.IsWhiteSpace(info,5));
    print(Char.IsWhiteSpace(info,6));
    print(Char.IsWhiteSpace(info,7));
    print(Char.IsWhiteSpace(info,8));
    print(Char.IsWhiteSpace(info,9));
    print(Char.IsWhiteSpace(info,10));
    print(Char.IsWhiteSpace(info,11));

    string [] split = info.Split();
    foreach(string s in split)
        print(s);
}

这是输出:

628      5911.3097      1660.0134      3771.8285              0
False
False
False
True
True
True
True
True
True
False
False
False
628
(empty)
(empty)
(empty)
(empty)
(empty)
5911.3097
(empty)
(empty)
(empty)
(empty)
(empty)
1660.0134
(empty)
(empty)
(empty)
(empty)
(empty)
3771.8285

在我看来,System.String.Split(null)只为我删除了一个空间:S

我正在使用:Unity3D,Mono,C#,Mac OSX 10.8

Answer 1

我怀疑问题是你把空字符串与空格混淆了.让我来证明:

    static void Main(string[] args)
    {
        var info = "628      5911.3097      1660.0134      3771.8285              0";
        Console.WriteLine(info);
        //foreach (var c in info)
        //    Console.WriteLine(Char.IsWhiteSpace(c));

        Console.WriteLine();

        string[] split = info.Split();
        foreach (string s in split)
            Console.WriteLine("\"" + s + "\" is empty: " + (s.Length == 0));

        //What happens if we concat the strings?
        Console.WriteLine();
        Console.WriteLine(string.Concat(split));

        Console.ReadLine();

        /*
        628      5911.3097      1660.0134      3771.8285              0

        "628" is empty: False
        "" is empty: True
        "" is empty: True
        "" is empty: True
        "" is empty: True
        "" is empty: True
        "5911.3097" is empty: False
        "" is empty: True
        "" is empty: True
        "" is empty: True
        "" is empty: True
        "" is empty: True
        "1660.0134" is empty: False
        "" is empty: True
        "" is empty: True
        "" is empty: True
        "" is empty: True
        "" is empty: True
        "3771.8285" is empty: False
        "" is empty: True
        "" is empty: True
        "" is empty: True
        "" is empty: True
        "" is empty: True
        "" is empty: True
        "" is empty: True
        "" is empty: True
        "" is empty: True
        "" is empty: True
        "" is empty: True
        "" is empty: True
        "" is empty: True
        "0" is empty: False

        6285911.30971660.01343771.82850
        */
    }

将来我可以建议您使用以下API调用吗？

string[] split = info.Split((char[])null,StringSplitOptions.RemoveEmptyEntries);

像这样:

static void Main(string[] args)
{
    var info = "628      5911.3097      1660.0134      3771.8285              0";
    Console.WriteLine(info);
    Console.WriteLine();

    string[] split = info.Split((char[])null,StringSplitOptions.RemoveEmptyEntries);
    foreach (string s in split)
        Console.WriteLine("\"" + s + "\" is empty: " + (s.Length == 0));

    //What happens if we concat the strings?
    Console.WriteLine();
    Console.WriteLine(string.Concat(split));

    Console.ReadLine();

    /*
    628      5911.3097      1660.0134      3771.8285              0

    "628" is empty: False
    "5911.3097" is empty: False
    "1660.0134" is empty: False
    "3771.8285" is empty: False
    "0" is empty: False

    6285911.30971660.01343771.82850
    */
}