How can I take only the number from strings in this format:
"####-somestring"
"###-someotherstring"
"######-anotherstring"
-
check the MaskedTextBox control en.csharp-online.net/MaskedTextBoxRaj More– Raj More2010-02-16 20:46:06 +00:00Commented Feb 16, 2010 at 20:46
-
you can still copy & paste non allowed characters into the textbox without additional validating, so you can just take a normal textbox and validate it yourself. Also, there is no mention of a control in the question.Femaref– Femaref2010-02-16 20:49:38 +00:00Commented Feb 16, 2010 at 20:49
Add a comment
|
5 Answers
int.parse( Regex.match(String, @"\d+").value)
2 Comments
BenAlabaster
Of course, you'd need a closing ", but this gets my upvote. You'd need to account for no-match situations too.
rerun
\d would do it just habit. you don't need the () since i'm not using a capture or a group
string s = "####-somestring";
string digits = s.Substring(0, s.IndexOf("-") - 1);
int parsedDigits = int.Parse(digits);
for more complicated combinations you'd have to use Regex.
Comments
if you are sure they will always have a '-' in them you can use the string split function.
string cutThisUp = "######-anotherstring";
string[] parts = cutThisUp.Split(Convert.ToChar("-"));
int numberPart = Convert.ToInt32(parts[0]);
1 Comment
Dan Tao
Just FYI, You don't need to call
Convert.ToChar("-"); use single quotes to indicate a char rather than a string (so: cutThisUp.Split('-')).You could use something like the following:
string s = "####-somestring";
return Regex.Match(s, "(\d)+").Value);
Comments
Yet another option: split on the - character and try to parse the first item in the resulting array (this is the same as nbushnell's suggestion, with a little added safety):
public bool TryGetNumberFromString(string s, out int number) {
number = default(int);
string[] split = s.Split('-');
if (split.Length < 1)
return false;
return int.TryParse(split[0], out number);
}
