Erase stuff from string

Raul Junc

Hello
I have this code:

string s;
s = "12345 ";

How can i delete that space from my string?
I want to obtain true from this if:

if(s == "12345")
MessageBox.Show("It's correct!");
else
MessageBox.Show("Wrong");

7 Replies

Know the answer? Post it — somebody with the same question will find it here.

Sascha B15y ago
Accepted answer
Or just replace the blanks with nothing :D String.Replace(' ',''); Then every blank is gone forever!
Vulpes15y ago
All the methods in the String class which appear to modify strings - even Trim() and TrimEnd() - create new ones. This is simply because strings are immutable.

However, this isn't normally a problem for the garbage collector as I pointed out in another recent thread (http://www.c-sharpcorner.com/Forums/Thread/113499/C-Sharp-string-split.aspx).

If you need a 'truly' mutable string, then use StringBuilder instead which is more efficient when several mutations or concatenations are needed.

Incidentally, you can mutate strings using pointers and unsafe code, though doing so isn't recommended as you may corrupt the string intern pool!
Suthish Nair15y ago
We must use String.Replace when there is an urgent need only.

The biggest problem is that it creates more string copies each time it is called. This can often lead
to measurable performance problems in large projects. Microsoft notes that "This method does not
modify the value of the current instance. Instead, it returns a new string in which all occurrences
of oldValue are replaced by newValue."

Yo must use as below instead of Replace...

if(s.Trim() == "12345")
Sam Hobbs15y ago
Why does Trim and TrimEnd not work? Is it because you need to remove all spaces from the string, not just the spaces at the end? Note that you example does not show that and your question does not say that. So just remember that you will usually get a better answer faster if you describe the problem clearly.
Raul Junc15y ago
Ty :D This is what i was looking for :P
Mahesh Chand15y ago
As Sam suggested, Trim and TrimEnd will do the trick.

Here is the code snippet.
http://www.c-sharpcorner.com/uploadfile/mahesh/2886/
Sam Hobbs15y ago
Did you look at the documentation of the String class? Does TrimEnd sound relevant? If not, then please clarify what you are asking.