如何用新对象填充集合，从另一个集合复制属性

Question

Let's say I have two classes:

Foo:

public class Foo {    
    int Id { get; set; }
    string Name { get; set; }
    string Type { get; set; }    
}

Bar:

public class Bar {
    string Name { get; set; }
    string Type { get; set; }
} 

So, Bar doesn't need an Id property. What I want to do is create a new collection of bar objects from an existing collection of Foo objects - there should be one Bar created for each Foo . Each Bar would have the Name and Type from the Foo that it was created from.

I know this will need to look something like this, but not quite sure how to complete it:

IEnumerable <Foo> foos = queryResults; //I'll get my foo's with a LINQ query
IEnumerable <Bar> bars = new IEnumerable<Bar>();

foreach (Foo f in foos) {
    //create a new Bar and add it to bars
} 

Please point me in the right direction!

Answer 1

您可以使用Linq查询来做到这一点：

IEnumerable <bar> bars = foos.Select(x => new bar{Name = x.Name, Type = x.Type});

Answer 2

Use List<Bar> instead of IEnumerable <Bar> , and assign the properties of Bar using its constructor as below

IEnumerable <Foo> foos = queryResults; //I'll get my foo's with a LINQ query
List<Bar> bars = new List<Bar>();

foreach (Foo f in foos) {
    bars.Add(new Bar() { Name = f.Name, Type = f.Type });
}