将字符串拆分为两个字符，忽略任何字符之前，之中或之后的空格

Question

I have an input string for example

var input = "'Test string','abc'";

I want to split it by exactly two characters that is ', ignoring white spaces before, in between or after the delimiters. For example based on the input I'm expecting the following output.

index0='Test string'
index1='abc'

I want to retain that output even if my input looks like any of these.

var input = "'Test string','abc'";
var input = "'Test string ','abc'";
var input = "'Test string' ,'abc'";
var input = "'Test string', 'abc'";
var input = "'Test string   '   ,   'abc'";

As long as there are two characters ', (single quote and comma) regardless that they have spaces before, in between or after, I want to split a string based on those two char delimiters. Splitting should only by two chars. If an input has only ' or , retain the input as is. Only split the input by ', not by any of the two chars. Please help. Here's my code.

   static void Main(string[] args)
    {
        var input = "'Test string','abc'";
        var results = Regex.Split(input, @"[ ',]+");
        foreach (var item in results)
            Console.WriteLine(item);
        Console.ReadLine();

    }

Answer 1

Or regex with this pattern for optional white space (?<=')\\s*,\\s*

Example

var inputs = new []{ "'Test string','abc'", 
                     "'Test string ','abc'", 
                     "'Test string' ,'abc'", 
                     "'Test string', 'abc'", 
                     "'Test string   '   ,   'abc'", 
                     "Test string','abc','John's test'" };

foreach (var input in inputs)
{
   var results = Regex.Split(input, @"(?<=')\s*,\s*");
   foreach (var result in results)
      Console.WriteLine(result);
}

Output

'Test string'
'abc'
'Test string '
'abc'
'Test string'
'abc'
'Test string'
'abc'
'Test string   '
'abc'
Test string'
'abc'
'John's test'

Visualized

Full Demo here

Answer 2

Try this:

string input = "'   Test string  ','abc'";
        string[] listInput = input.Split(',');
        foreach (string li in listInput){
          String output = li.TrimStart('\'').TrimEnd('\'').Trim();
            output = "'"+output+"'";
          Console.WriteLine(output);
        }

Answer 3

Split by comma and trim single quote and spaces afterwards

var input = "'Test string   '   ,   'abc', 'John's test'";

var output = input.Split(',').Select(p => p.Trim().Trim('\'').Trim());

// Test string, abc, John's test.

Answer 4

If the input is predictable and never contains an escaped quotation mark, you can do this:

input.Split('\'').Where((x, i) => i % 2 == 1).Select(p => p.Trim());

See it in use here: https://dotnetfiddle.net/AqookJ

---

input.Split('\'')

Splits the input by '

.Where((x, i) => i % 2 == 1)

Selects every second item of the split, which is everything inside of quotes in this context. For efficiency this can be changed to (x, i) => (i & 1) == 1

.Select(p => p.Trim())

Will remove whitespace from the beginning and end of every item in the collection.

---

If however there are quotation marks inside of the target strings you can use this following method:

public static IEnumerable<string> Split(string inpt)
{
    IEnumerable<string> res = Regex.Split(inpt, @"('\s*,\s*'|^\s*'|'\s*$)").Where((x, i) => i % 2 == 0).Select(p => p.Trim()).Skip(1);
    return res.Take(res.Count() - 1);
}

This will split the input by '\\s*,\\s*' , and also by ^\\s*' and '\\s*$ .

It will then discard the first and last items of the collection, which will be the first and last quotation marks.

See it in action here: https://dotnetfiddle.net/sQ6Y2x

Answer 5

You can create method like below to get desired value. Call this method for each data.

private string GetValues(string input)
{
    StringBuilder newValue = new StringBuilder();
    string[] parts = input.Split(',');
    int counter = 0;
    foreach (string str in parts)
    {
        newValue.AppendLine("index" + counter++ + ":" + "'" + str.Trim().Trim('\'').Trim() + "'");

    }
    return newValue.ToString();
}

Input:

"'Test string','abc'";
"'Test string ','abc'";
"'Test string' ,'abc'";
"'Test string', 'abc'";
"'Test string   '   ,   'abc'";
"Test string','abc','John's test'";

Output is as below:

index0:'Test string'
index1:'abc'

index0:'Test string'
index1:'abc'

index0:'Test string'
index1:'abc'

index0:'Test string'
index1:'abc'

index0:'Test string'
index1:'abc'

index0:'Test string'
index1:'abc'
index2:'John's test'