c# - 如何在 C# 中创建新对象列表？

Question

我想为列表创建一个对象列表。我知道可以在下面执行此操作，但这不是我想要的。

view.BindingContext =
                new ViewModel
            { 
                List = new List<Section> {
                    new Section
                    {
                        Title = "Chapter 1",
                        List = new List<Reading> {
                            new Reading { Title = "Title" Text = "abc" },
                            new Reading { Title = "Title" Text = "abc" },
                            new Reading { Title = "Title" Text = "abc" },
                            new Reading { Title = "Title" Text = "abc" },
                            new Reading { Title = "Title" Text = "abc" },
                            new Reading { Title = "Title" Text = "abc" },
                            new Reading { Title = "Title" Text = "abc" },
                        }
                    },
                }
            };

我想从另一个对象列表创建新对象，而不是上面的代码。所以像这样；

view.BindingContext =
            new ViewModel
            {
                List = new List<Section>
                {
                 foreach(Chapter chapter in ChapterList)
                    {
                    new Section { Title = chapter.Title, List = chapter.ReadingList },
                    }
                }
            };

Answer 1

好吧，您可以在初始构造之后 循环。在一个声明中做所有事情被高估了。

但是!

new List<Foo>(oldList.Select(x => new Foo { A = x.A, B = x.B, ... }))

应该作为列表和列表项的简单克隆，就像:

oldList.ConvertAll(x => new Foo { A = x.A, B = x.B, ...})

或(如评论中所述)

oldList.Select(x => new Foo { A = x.A, B = x.B, ... }).ToList()