问题
How can I remove all white space from the beginning and end of a string?
Like so:
\"hello\" returns \"hello\"\"hello \" returns \"hello\"\" hello \" returns \"hello\"\" hello world \" returns \"hello world\"
回答1:
String.Trim() returns a string which equals the input string with all white-spaces trimmed from start and end:
" A String ".Trim() -> "A String"
String.TrimStart() returns a string with white-spaces trimmed from the start:
" A String ".TrimStart() -> "A String "
String.TrimEnd() returns a string with white-spaces trimmed from the end:
" A String ".TrimEnd() -> " A String"
None of the methods modify the original string object.
(In some implementations at least, if there are no white-spaces to be trimmed, you get back the same string object you started with:
csharp> string a = "a";
csharp> string trimmed = a.Trim();
csharp> (object) a == (object) trimmed;
returns true
I don't know whether this is guaranteed by the language.)
回答2:
take a look at Trim() which returns a new string with whitespace removed from the beginning and end of the string it is called on.
回答3:
string a = " Hello ";
string trimmed = a.Trim();
trimmed is now "Hello"
回答4:
use the String.Trim() function.
string foo = " hello ";
string bar = foo.Trim();
Console.WriteLine(bar); // writes "hello"
回答5:
Use String.Trim method.
回答6:
String.Trim() removes all whitespace from the beginning and end of a string.
To remove whitespace inside a string, or normalize whitespace, use a Regular Expression.
来源：https://stackoverflow.com/questions/3381952/how-to-remove-all-white-space-from-the-beginning-or-end-of-a-string