c＃tab分隔符中的string.Split函数

Question

I have a function which reads a delimited file.

The delimiter is passed to the function by string argument. The problem is, when I pass the "\\t" delimiter, it ends up like "\\\\t" and therefore, Split is unable to find this sequence.

How can I resolve this issue?

private void ReadFromFile(string filename, string delimiter)
{

        StreamReader sr = new StreamReader(filename, Encoding.Default);
        string[] firstLine = sr.ReadLine().Split(t.ToCharArray());

        .......
 }

Answer 1

I guess you are using something like

string sep = @"\t";

in this case sep will hold \\\\t double back slash

use string sep = "\\t"

string content = "Hello\tWorld";
string sep = "\t";
string[] splitContent = content.Split(sep.ToCharArray());

Answer 2

像Split（'\\ t'）一样使用单一的qutes，这样你就会传递一个char而不是一个字符串。

Answer 3

pass parameter value as Decimal number of \\t (tab) and convert to it Char.

 int delimeter =9;

 // 9  ==> \t 
 // 10 ==> \n
 // 13 ==> \r

 char _delimeter = Convert.ToChar(delimeter);

 string[] rowData = fileContent.Split(_delimeter);

Happy Programming.

Answer 4

If you pass in "\\t" as the delimiter nothing will change it to "\\t". Something else is double escaping your tab.

    Blah("\t");
    private static void Blah(string s)
    {
        var chars = s.ToCharArray();
        Debug.Assert(chars.Length == 1);

        var parts = "blah\tblah\thello".Split(chars);            
        Debug.Assert(parts.Length == 3);
    }

Answer 5

Another way to do your split is replacing the TAB(\\t) by a blank space on this way:

            if(linea.ToLower().Contains(@"\t"))
                linea = linea.Replace(@"\t", " ");
            retVal = linea.Trim().Split(' ')[1];

This code works for me.

Answer 6

你试过吗：Environment.NewLine？