动态LINQ OR条件 [英] Dynamic LINQ OR Conditions

问题描述

我正在寻找使用LINQ在类似集合的条件上进行多次where条件

I'm looking to use LINQ to do multiple where conditions on a collection similar to

IEnumerable<Object> items;
items.Where(p => p.FirstName = "John");
items.Where(p => p.LastName = "Smith");

除了具有多个AND条件(如本示例所示)外，我希望具有多个OR条件.

except for rather than having multiple AND conditions (as with this example), I'd like to have multiple OR conditions.

编辑 抱歉，为了澄清，我不知道会有多少这样的条件

EDIT Sorry, to clarify I don't know how many of these conditions I will have so

items.Where(p => p.FirstName = "John" || p => p.LastName = "Smith")

不起作用.

基本上，这就是我想要做的:

Basically, here's what I'm trying to do:

foreach(var name in names)
{
    items = items.Where(p => p.Name == name);
}

推荐答案

听起来您的白名单仅在运行时才知道.也许试试看:

It sounds like your whitelist of names is only known at runtime. Perhaps try this:

string[] names = new string[] {"John", "foo", "bar"};

var matching = items.Where(x => names.Contains(x.Name));

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