具有循环linq C＃的动态where子句

Question

I have dictionary with regular expressions and a data table.

var data = ds.Tables["mytable"].AsEnumerable();

var regexlist = new Dictionary<string, Regex>
{
     {"PI1", new Regex(@"(-.[^I](-P[^IS]))|(-[^P].(-P[^IS]))")},
     {"SM1", new Regex("(-.[^I](-P[^IS]))|(-[^P].(-P[^IS]))")}
};

Now I want to select all rows of the data table that does not match the regular expressions in the list and also the key of the dictionary (the error code).

So far I have this:

var query = data.Select(dr => dr.Field<string>("F1"));
query = regexlist.Aggregate(query, (current, regex1) => current.Where(u => regex1.Value.IsMatch(u) ));

but I think that only the first regex is added as where clause. And I don't know how to output the "error code"

I hope I explained my problem clear.

jonas

Answer 1

整个过程看起来还不错，除了其中的表达式不能反映您的目标，您需要反转测试子句以获取与正则表达式不匹配的数据

current.Where(u => regex1.Value.IsMatch(u) == false)