Remove the last three characters from a string
C#.NetC# Problem Overview
I want to remove last three characters from a string:
string myString = "abcdxxx";
Note that the string is dynamic data.
C# Solutions
Solution 1 - C#
> read last 3 characters from string [Initially asked question]
You can use string.Substring and give it the starting index and it will get the substring starting from given index till end.
myString.Substring(myString.Length-3)
> Retrieves a substring from this instance. The substring starts at a > specified character position. MSDN
Edit, for updated post
> Remove last 3 characters from string [Updated question]
To remove the last three characters from the string you can use string.Substring(Int32, Int32) and give it the starting index 0
and end index three less than the string length. It will get the substring before last three characters.
myString = myString.Substring(0, myString.Length-3);
String.Substring Method (Int32, Int32) > Retrieves a substring from this instance. The substring starts at a > specified character position and has a specified length.
You can also using String.Remove(Int32) method to remove the last three characters by passing start index as length - 3, it will remove from this point to end of string.
myString = myString.Remove(myString.Length-3)
> Returns a new string in which all the characters in the current > instance, beginning at a specified position and continuing through the > last position, have been deleted
Solution 2 - C#
myString = myString.Remove(myString.Length - 3, 3);
Solution 3 - C#
I read through all these, but wanted something a bit more elegant. Just to remove a certain number of characters from the end of a string:
string.Concat("hello".Reverse().Skip(3).Reverse());
output:
"he"
Solution 4 - C#
myString.Remove(myString.Length-3);
Solution 5 - C#
The new C# 8.0 range operator can be a great shortcut to achieve this.
Example #1 (to answer the question):
string myString = "abcdxxx";
var shortenedString = myString[0..^3]
System.Console.WriteLine(shortenedString);
// Results: abcd
Example #2 (to show you how awesome range operators are):
string s = "FooBar99";
// If the last 2 characters of the string are 99 then change to 98
s = s[^2..] == "99" ? s[0..^2] + "98" : s;
System.Console.WriteLine(s);
// Results: FooBar98
Solution 6 - C#
string test = "abcdxxx";
test = test.Remove(test.Length - 3);
//output : abcd
Solution 7 - C#
You can use String.Remove
to delete from a specified position to the end of the string.
myString = myString.Remove(myString.Length - 3);
Solution 8 - C#
Probably not exactly what you're looking for since you say it's "dynamic data" but given your example string, this also works:
? "abcdxxx".TrimEnd('x');
"abc"
Solution 9 - C#
str= str.Remove(str.Length - 3);
Solution 10 - C#
myString.Substring(myString.Length - 3, 3)
Here are examples on substring.>>
http://www.dotnetperls.com/substring
Refer those.
Solution 11 - C#
string myString = "abcdxxx";
if (myString.Length<3)
return;
string newString=myString.Remove(myString.Length - 3, 3);
Solution 12 - C#
Easy. text = text.remove(text.length - 3)
. I subtracted 3 because the Remove
function removes all items from that index to the end of the string which is text.length
. So if I subtract 3 then I get the string with 3 characters removed from it.
You can generalize this to removing a
characters from the end of the string, like this:
text = text.remove(text.length - a)
So what I did was the same logic. The remove
function removes all items from its inside to the end of the string which is the length of the text. So if I subtract a
from the length of the string that will give me the string with a
characters removed.
So it doesn't just work for 3, it works for all positive integers, except if the length of the string is less than or equal to a
, in that case it will return a negative number or 0.
Solution 13 - C#
If you're working in C# 8 or later, you can use "ranges":
string myString = "abcdxxx";
string trimmed = myString[..^3]; // "abcd"
More examples:
string test = "0123456789", s;
char c;
c = test[^3]; // '7'
s = test[0..^3]; // "0123456"
s = test[..^3]; // "0123456"
s = test[2..^3]; // "23456"
s = test[2..7]; // "23456"
//c = test[^12]; // IndexOutOfRangeException
//s = test[8..^3]; // ArgumentOutOfRangeException
s = test[7..^3]; // string.Empty
Solution 14 - C#
Remove the last characters from a string
TXTB_DateofReiumbursement.Text = (gvFinance.SelectedRow.FindControl("lblDate_of_Reimbursement") as Label).Text.Remove(10)
.Text.Remove(10)
// used to remove text starting from index 10 to end
Solution 15 - C#
items.Remove(items.Length - 3)
string.Remove()
removes all items from that index to the end. items.length - 3
gets the index 3 chars from the end