Question

目标文件 :

Hello
World

守则:

if (file != null)
{
    //Read file one character at a time
    StreamReader reader;
    reader = new StreamReader(file);
    do
    {
        int s = reader.Read();
        char sC = (char)s;
        if (sC.Equals(Environment.NewLine))
        {
            Console.WriteLine("+1");
        }
        Console.WriteLine((char)s);
    } while (!reader.EndOfStream);
    reader.Close();
    reader.Dispose();
}

产出:

H
e
l
l
o




W
o
r
l
d

所以 (sC.Equals (Environment.NewLine)) 显然在每次读取一个字符时无法检测到平台的独立新线。我该怎么做?

Answer 1

来试试这个吧

if (sC.Equals( 
 ))

If you are sure there will always be a after the then you can swallow it with another reader.Read(); call. Example:

if (sC.Equals( 
 )) {
   reader.Read()
   Console.WriteLine("+1");
}

Answer 2

That s because Environment.NewLine is a String consisting of (depends on your environment, on Windows platforms it s ) - which are the Carrige Return and New Line characters - it s a pair that usually defines a New line.

So comparing a character (which can either be or ) to will always yield false

Instead, as mentioned in @jurgen d s answer, try to compare to .

Answer 3

Environment.NewLine is actually two characters:

您真的需要一次读取一个字符吗? 您是否更喜欢使用 < a href=" http://msdn.microsoft.com/ en- us/library/ system.io. stringreder.aspx" rel = "nofollow"\\ code > StringReader , 并使用 ReadLine ()?

Answer 4

easy way to remove

        String text = "test

";
        if (text[text.Length - 1] == 10 && text[text.Length - 2] == 13)
            text= text.Substring(0, text.Length - 2);

Answer 5

用这个...

if (sC.Equals( 
 ))

As comes before in your case.

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