[英]How can I intersect two different .NET lists by a single property?
I'm trying to filter my first list of Foo's based on some values in a second list of Baa's. 我试图根据第二个Baa列表中的某些值来过滤我的第一个Foo列表。
For example. 例如。
Here's an example I put up on .NET Fiddle ... 这是我在.NET Fiddle中提出的一个例子 ......
var foos = new List<Foo>
{
new Foo { Name = "Leia" },
new Foo { Name = "Han Solo" },
new Foo { Name = "Chewbacca" },
new Foo { Name = "Luke" },
};
var baas = new List<Baa>
{
new Baa { Alias = "aaaaa" },
new Baa { Alias = "bbbb" },
new Baa { Alias = "Leia" },
new Baa { Alias = "Luke" }
};
// Expected output:
// List<Foo> results = Foo { "Leia" } and Foo { "Luke" };
See how I'm asking for: Filter the first list (by Name
) by the second lists Alias
property. 看看我的要求:通过第二个列表
Alias
属性过滤第一个列表(按Name
)。
and that will return a List of Foo
with 2 results in it? 这将返回一个
Foo
列表,其中包含2个结果?
Any clues? 有线索吗?
You can use Any
on the list of baas
: 您可以在
baas
列表中使用Any
:
foos.Where(f => baas.Any(b => b.Alias == f.Name));
Or use a join (cleaner in query syntax): 或者使用连接(查询语法中的清理器):
var query =
from f in foos
join b in baas on f.Name equals b.Alias
select f;
Here's the code in a full working .NET Fiddle. 这是完整的.NET Fiddle中的代码 。
You could use Join : 你可以使用Join :
var results = foos.Join(baas, f => f.Name, b => b.Alias, (f, b) => f);
Similar to this answer . 与此答案类似。
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