Trim last character from a string

Question

I have a string say

\"Hello! world!\" 

I want to do a trim or a remove to take out the ! off world but not off Hello.

Answer 1

I took the path of writing an extension using the TrimEnd just because I was already using it inline and was happy with it... i.e.:

static class Extensions
{
        public static string RemoveLastChars(this String text, string suffix)
        {            
            char[] trailingChars = suffix.ToCharArray();

            if (suffix == null) return text;
            return text.TrimEnd(trailingChars);
        }

}

Make sure you include the namespace in your classes using the static class ;P and usage is:

string _ManagedLocationsOLAP = string.Empty;
_ManagedLocationsOLAP = _validManagedLocationIDs.RemoveLastChars(",");          

Answer 2

The another example of trimming last character from a string:

string outputText = inputText.Remove(inputText.Length - 1, 1);

You can put it into an extension method and prevent it from null string, etc.

Answer 3

If you want to remove the '!' character from a specific expression("world" in your case), then you can use this regular expression

string input = "Hello! world!";

string output = Regex.Replace(input, "(world)!", "$1", RegexOptions.Multiline | RegexOptions.Singleline);

// result: "Hello! world"

the $1 special character contains all the matching "world" expressions, and it is used to replace the original "world!" expression

Answer 4

you could also use this:

public static class Extensions
 {

        public static string RemovePrefix(this string o, string prefix)
        {
            if (prefix == null) return o;
            return !o.StartsWith(prefix) ? o : o.Remove(0, prefix.Length);
        }

        public static string RemoveSuffix(this string o, string suffix)
        {
            if(suffix == null) return o;
            return !o.EndsWith(suffix) ? o : o.Remove(o.Length - suffix.Length, suffix.Length);
        }

    }

Answer 5

string helloOriginal = "Hello! World!";
string newString = helloOriginal.Substring(0,helloOriginal.LastIndexOf('!'));

Answer 6

if (yourString.Length > 1)
    withoutLast = yourString.Substring(0, yourString.Length - 1);

or

if (yourString.Length > 1)
    withoutLast = yourString.TrimEnd().Substring(0, yourString.Length - 1);

...in case you want to remove a non-whitespace character from the end.