我要寻找一个优雅的方式，preferably短LINQ EX pression，计算有多少个字母数字字符指定字符串中包含。

I am looking for an elegant way, preferably a short linq expression, to count how many alphanumeric chars a given string contains.

在'无聊'的方式我现在做的是这样的：

The 'boring' way I do it now is this:

int num = 0;
for (int i = 0; i < password.Length; i++)
{
    if (!char.IsLetterOrDigit(password, i))
    {
        num++;
    }
}
if (num < MinRequiredNonAlphanumericCharacters)
    return false;

这是相当短了，但我相信有一些LINQ魔术这可以在更短的，同样可以理解的EX pression做，对不对？

This is rather short already, but I am sure with some linq magic this can be done in an even shorter, equally understandable expression, right?

推荐答案

这里的快速和肮脏的LINQ的方式来获得字母放大器;数字计数：

Here's the quick and dirty LINQ way to get the letter & digit count:

password.Count(char.IsLetterOrDigit)

这是多的，你在做什么，直接复制：

This is more of a direct copy of what you're doing:

password.Count(c => !char.IsLetterOrDigit(c))