CODEWITHSUNDEEP
c#linq
commutiy
commutiy

Reputation: 41

Remove a value from comma separated string in C#

I have done something like:

var a = "77,82,83";
foreach (var group in a.Split(','))
{
    a = group.Replace("83", string.Empty);
}

If i want to remove 83 but override last updated value and got output empty or remove value from that i passed to replace.

e.g var a = 77,82,83 want output like 77,82

Edit:

"83" can be in any position.

Upvotes: 1

Views: 2723

Answers (2)

adiga
adiga

Reputation: 35222

If you want output as string you don't need to Split. Just get the LastIndexOf the , character and perform Substring on the variable:

var a = "77,82,83";
var newString = a.Substring(0, a.LastIndexOf(',')); // 77,82

If you are unsure if the string has at least one ,, you can validate before performing a Substring:

var a = "77,82,83";
var lastIndex = a.LastIndexOf(',');

if (lastIndex > 0)
    var newString = a.Substring(0, lastIndex);

Update:

If you want to remove specific values from any position:

Split the string -> Remove the values using Where -> Join them with , separator

a = string.Join(",", a.Split(',').Where(i => i != "83"));

Here's a fiddle

Upvotes: 4

melkisadek
melkisadek

Reputation: 1053

You might need to clarify the question slightly but I think you're asking for the following:

var a = "72,82,83";
var group = a.Split(',').ToList();
int position = group.FindIndex(p => p.Contains("83"));
group.RemoveAt(position);

You can make the item you're looking for in the Contains query a parameter.

I think the problem you're having with your original code is that the foreach is a loop over each item in the array, so you're trying to remove "83" on each pass.

Upvotes: 0

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