如何使用LINQ从带分隔符的字符串中获取带引号的字段作为未带引号的值的列表？

Question

Original text line is: "125"|"Bio Methyl"|"99991"|"OPT12"|"CB"|"1"|"12"|"5"|"23"

Expected string list is free of double quotes and split by | :

125
Bio Methyl
99991

The text may contain empty quoted strings as in (former "OPT12" value now empty ""):

"125"|"Bio Methyl"|"99991"|""|"CB"|"1"|"12"|"5"|"23"

So I checked these two questions & answers : QA1 and QA2 to derive my solution.

var eList = uEList.ElementAt(i).Split(BarDelimiter);
var xList = eList.ElementAt(0).Where(char.IsDigit).ToList();

Of course it doesn't work the way I need it to be since xList is a list with elements like this: xList(0) = 1, xList(1) = 2, xList(2) = 5

I do not want to write another line to join them because this doesn't look like a suitable solution. There has to be something better with LINQ right?

Answer 1

How about this:

// Based on OPs comment: preserve empty non-quoted entries.
var splitOptions = StringSplitOptions.None;
//change to the below if empty entries should be removed
//var splitOptions = StringSplitOptions.None;
var line = "\"125\"|\"Bio Methyl\"|\"99991\"|\"OPT12\"|\"CB\"|\"1\"|\"12\"|\"5\"|\"23\"";
var result = line
    .Split(new[] { "|" }, splitOptions)
    .Select(p => p.Trim('\"'))
    .ToList();
Console.WriteLine(string.Join(", ", result));

The Split(...) statement splits the input into an array with parts like

{ \"99991\", \"OPT12\", ... };

The p.Trim('\\"') statement removes the leading and trailing quote from each of the parts.

Answer 2

As an alternative to the trimming, if there's no " in your values, you could simply sanitize the input before splitting it. You can do so by replacing the " symbol by nothing (either "" or string.Empty ).

Your Split code would then give the correct result afterwards:

string uEList = "\"125\"|\"Bio Methyl\"|\"99991\"|\"OPT12\"|\"CB\"|\"1\"|\"12\"|\"5\"|\"23\"";
var eList = uEList.Replace("\"", string.Empty).Split(BarDelimiter);