Regex.Split和string.Split无法正常工作

Question

I am attempting to split strings using '?' as the delimiter. My code reads data from a CSV file, and certain symbols (like fractions) are not recognized by C#, so I am trying to replace them with a relevant piece of data (bond coupon in this case). I have print statements in the following code (which is embedded in a loop with index variable i) to test the output:

string[] l = lines[i][1].Split('?');               
//string[] l = Regex.Split(lines[i][1], @"\?");

System.Console.WriteLine("L IS " + l.Length.ToString() + " LONG");
for (int j = 0; j < l.Length; j++)
    System.Console.WriteLine("L["+ j.ToString() + "] IS " + l[j]);

if (l.Length > 1)
{
    double cpn = Convert.ToDouble(lines[i][12]);
    string couponFrac = (cpn - Math.Floor(cpn)).ToString().Remove(0,1);
    lines[i][1] = l[0].Remove(l[0].Length-1) + couponFrac + l[1]; // Recombine, replacing '?' with CPN
}

The issue is that both split methods ( string.Split() and Regex.Split() ) produce inconsistent results with some of the string elements in lines splitting correctly and the others not splitting at all (and thus the question mark is still in the string).

Any thoughts? I've looked at similar posts on split methods and they haven't been too helpful.

Answer 1

I didn't have any trouble parsing the following.

var qsv = "now?is?the?time";
var keywords = qsv.Split('?');
keywords.Dump();

screenshot of code and output...

UPDATE: There doesn't appear to be any problem with Split . There is a problem somewhere else because in this small scale test it works just fine. I would suggest you use LinqPad to test out these kinds of scenarios small scale.

var qsv = "TII 0 ? 04/15/15";
var keywords = qsv.Split('?');
keywords.Dump();

qsv = "TII 0 ? 01/15/22";
keywords = qsv.Split('?');
keywords.Dump();

New updated output:

Answer 2

I had no problem using String.Split. Could you post your input and output? If at all you could probably use String.Replace to replace your desired '?' with a character that does not occur in the string and then use String.Split on that character to split the resultant string for the same effect. (just a try)