如何从字符串中删除逗号分隔值？

Question

I want to remove a comma separated value from the string..

suppose I have a string like this

string x="r, v, l, m"

and i want to remove r from the above string, and reform the string like this

string x="v, l, m"

from the above string i want to remove any value that my logic throw and reform the string. it should remove the value and comma next to it and reform the string...

---

The below is specific to my code.. I want to remove any value that I get from the logic, I want to remove it and comma next to it and reform the string with no empty space on the deleted item.. How can I achieve this?

offIdColl = my_Order.CustomOfferAppliedonOrder.TrimEnd(',');
if (offIdColl.Split(',').Contains(OfferID.ToString()))
{
    // here i want to perform that operation.   

}

Tombala, i applied it like this but it doesn't work..it returns true

 if (!string.IsNullOrEmpty(my_Order.CustomOfferAppliedonOrder))
                                {
                                    offIdColl = my_Order.CustomOfferAppliedonOrder.TrimEnd(',');
                                    if (offIdColl.Split(',').Contains(OfferID.ToString()))
                                    {
                                        string x = string.Join(",", offIdColl.Split(new char[] { ',' },
    StringSplitOptions.RemoveEmptyEntries).ToList().Remove(OfferID.ToString()));
                                    }
                                }
                            }

Answer 1

Just do something like:

List<String> Items = x.Split(",").Select(i => i.Trim()).Where(i => i != string.Empty).ToList(); //Split them all and remove spaces
Items.Remove("v"); //or whichever you want
string NewX = String.Join(", ", Items.ToArray());

Answer 2

Something like this?

string input = "r,v,l,m";
string output = String.Join(",", input.Split(',').Where(YourLogic));

bool YourLogic(string x)
{
    return true;
}

Answer 3

var l = x.Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries).ToList();
l.Remove(OfferID.ToString());
x = string.Join(",", l);

Edit: Sorry, you're right. Remove doesn't return the original list. You need multiple statements. But you don't need to trim the end "," implicitly. You can remove that statement from your code as well as the check to see if the item is there or not. The Remove will take it out if it was found or simply return false if it was not found. You don't have to check existence. So remove the TrimEnd from the first and get rid of the second line below:

offIdColl = my_Order.CustomOfferAppliedonOrder; //.TrimEnd(',');
//if (offIdColl.Split(',').Contains(OfferID.ToString()))

Answer 4

Not quite sure if this is what you mean, but this seems simplest and most readable:

        string x = "r, v, l, m";
        string valueToRemove = "r";
        var result = string.Join(", ", from v in x.Split(',')
                                       where v.Trim() != valueToRemove
                                       select v);

Edit: like Bob Sammers pointed out, this only works in .NET 4 and up.

Answer 5

String input = "r, v, l, m, ";

string itemToReplace = "v, ";

string output = input.Replace(itemToReplace, string.Empty)

Answer 6

public void string Remove(string allStuff, string whatToRemove)
{
  StringBuilder returnString = new StringBuilder();
  string[] arr = allStuff.Split('');
   foreach (var item in arr){
     if(!item.Equals(whatToRemove)){
     returnString.Append(item);
     returnString.Append(", "); 
    }
   }
  return returnString.ToString();
}

Answer 7

So you want to delete an item (or replace it with a nother value) and join the string again with comma without space?

string x = "r, v, l, m,";
string value = "v";
string[] allVals = x.TrimEnd(',').Split(new []{','}, StringSplitOptions.RemoveEmptyEntries);
// remove all values:
x = string.Join(",", allVals.Where(v => v.Trim() != value));
// or replace these values
x = string.Join(",", allVals.Select(v => v.Trim() == value ? "new value" : v));

Answer 8

// If you want to remove ALL occurences of the item, say "a" you can use

  String data = "a, b, c, d, a, e, f, q, a";

  StringBuilder Sb = new StringBuilder();

  foreach (String item in data.Split(',')) {
    if (!item.Trim().Equals("a", StringComparison.Ordinal)) {
      if (Sb.Length > 0) 
        Sb.Append(',');

      Sb.Append(item);
    }
  }

  data = Sb.ToString();

Answer 9

Not going about this right. Do you need to keep the string? I doubt you do. Just use a list instead. Can you have duplicates? If not:

offIdColl = my_Order.CustomOfferAppliedonOrder.TrimEnd(',').Split(',');

if (offIdColl.Contains(OfferID.ToString()))
{
    offIdColl.Remove(OfferID.ToString());
}

Answer 10

Its just single line of code in many ways, two of them are below:

string x = "r,v,l,m";
string NewX = String.Join(",", from i in x.Split(',') where  i != String.Empty && i != "v" select i);

OR

string NewX = String.Join(",", x.Split(',').Select(i => i.Trim()).Where(i => i != String.Empty && i != "v"));