将一种类型的列表转换为C＃3.5中另一种类型的列表

Question

I have an object, with ID and Name properties.

I have a list of the objects, but I want to convert it to a list of strings containing the name of the object. I'm guessing there's some fancy Linq method that will put the name of the object into the list.

List<string> myObjectNames = myObjectList.?

Answer 1

If you know it is specifically a List<T> and not another collection type then you can use List<T>.ConvertAll :

Converts the elements in the current List<T> to another type, and returns a list containing the converted elements.

Example:

List<string> myObjectNames = myObjectList.ConvertAll(x => x.Name);

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If you just know that it is an enumerable type but not necessarily a list then you can use the LINQ extension methods Enumerable<T>.Select and Enumerable<T>.ToList :

List<string> myObjectNames = myObjects.Select(x => x.Name).ToList();