正则表达式用于分割字符串和数字

I have a string of the form:

我有一串表格:

codename123

Is there a regular expression that can be used with Regex.Split() to split the alphabetic part and the numeric part into a two-element string array?

是否有正则表达式可以与Regex.Split()一起使用，将字母部分和数字部分分割为两个元素字符串数组?

7 个解决方案

#1

I know you asked for the Split method, but as an alternative you could use named capturing groups:

我知道你想要拆分方法，但作为一种选择，你可以使用命名捕获组:

var numAlpha = new Regex("(?<Alpha>[a-zA-Z]*)(?<Numeric>[0-9]*)");
var match = numAlpha.Match("codename123");

var alpha = match.Groups["Alpha"].Value;
var num = match.Groups["Numeric"].Value;

#2

splitArray = Regex.Split("codename123", @"(?<=\p{L})(?=\p{N})");

will split between a Unicode letter and a Unicode digit.

将在Unicode字母和Unicode数字之间进行分割。

#3

Regex is a little heavy handed for this, if your string is always of that form. You could use

如果您的字符串始终是那种形式，那么Regex就有点笨拙了。您可以使用

"codename123".IndexOfAny(new char[] {'1','2','3','4','5','6','7','8','9','0'})

and two calls to Substring.

两个调用子字符串。

#4

A little verbose, but

有点冗长,但

Regex.Split( "codename123", @"(?<=[a-zA-Z])(?=\d)" );

Can you be more specific about your requirements? Maybe a few other input examples.

你能更具体地说明你的要求吗?也许还有其他一些输入例子。

#5

IMO, it would be a lot easier to find matches, like:

在我看来，找到比赛要容易得多，比如:

Regex.Matches("codename123", @"[a-zA-Z]+|\d+")
     .Cast<Match>()
     .Select(m => m.Value)
     .ToArray();

rather than to use Regex.Split.

而不是使用Regex.Split。

#6

Another simpler way is

另一个简单的方法是

string originalstring = "codename123";
string alphabets = string.empty;
string numbers = string.empty;

foreach (char item in mainstring)
{
   if (Char.IsLetter(item))
   alphabets += item;
   if (Char.IsNumber(item))
   numbers += item;
}

#7

Well, is a one-line only: Regex.Split("codename123", "^([a-z]+)");

只有一行:Regex。分割(“codename123”、“^”([a - z]+));

#1