在C#中简单获取字符串(忽略末尾的数字)

Question

我认为正则表达式是矫枉过正也需要一些时间来编写一些代码(我想我现在应该学习我知道一些正则表达式).

什么是用字母数字字符串分隔字符串的最简单方法？它永远是LLLLDDDDD.我只想要字母(l's),通常只有1或2个字母.

Answer 1

TrimEnd:

string result = input.TrimEnd(new char[]{'0','1','2','3','4','5','6','7','8','9'});
// I'm sure using LINQ and Range can simplify that.
// also note that a string like "abc123def456" would result in "abc123def"

但RegEx也很简单:

string result = Regex.Match(input,@"^[^\d]+").Value;

Answer 2

我更喜欢Michael Stum的正则表达式答案,但这里也是一个LINQ方法:

string input = "ABCD1234";
string result = new string(input.TakeWhile(c => Char.IsLetter(c)).ToArray());