x量相同后拆分字符串

Question

I need to split a string in C# as follows:

The string is something like this: 0000120400567

There are always 0 s at the beginning. In the example above there are six zeros followed by 120400567 . I want to split the string that I get the last part 120400567 .

The amount of zeros at the beginning might change (the last part number will increase by one number) that means we can have 001245878945 and what I want is 1245878945 .

How can I split this string leaving off the first 0 or the first x amount of zeros and get the end number only? It might be so that the number don't have any zero at the beginning and the number starts directly from the first number ... but it might be that the number contains 8 zeros and than 2 or more number of digits.

Answer 1

string withoutLeadingZeroes = withLeadingZeroes.TrimStart('0');

(or

string withoutLeadingZeroes = Regex.Replace(withLeadingZeroes, "^0*", "");

or

string withoutLeadingZeroes = new String(
    withLeadingZeroes.SkipWhile(c => c == '0').ToArray());

or ...)

Answer 2

TrimStart is your friend. However, you need to be careful that you don't end up with an empty string when your original consists of 0s only.

string s = "0000120400567";
s = s.TrimStart('0');
if (s == "")
    s = "0";

Answer 3

You could use int.Parse to convert the String into an Integer. This would drop leading zeros, but is of course limited to strings within the range of int (or long, if you use it).

Answer 4

Why don't you convert it into int32 or long or whatever you want and then convert it into a string ?

int i = int.Parse("0000120400567");
        string s = i.ToString();

Answer 5

If you have a range of numbers in the string you can use (?:\\b(?:0+|(?=[1-9]))) to split that string

So splitting 0534 000500 35435 040 with the above regex would end up with

534 
500
35435 
40

---

If it's going to contain only a single number Regex is not required then and especially splitting it

But if you still want to split that string,you can do it with (?:^0+|^)