我想知道是否有办法初始化List< T>其中T是一个对象,就像一个简单的集合被初始化？
Simple Collection Initializer:
List<int> digits = new List<int> { 0,1,2,3,4,5,6,7,8,9 };
List<ChildObject> childObjects = new List<ChildObject>
{
new ChildObject(){ Name = "Sylvester",Age=8 },new ChildObject(){ Name = "Whiskers",Age=2 },new ChildObject(){ Name = "Sasha",Age=14 }
};
问题是,如何以及如果你能做这样的事情？
List<ChildObject> childObjects = new List<ChildObject>
{
{ "Sylvester",8},{"Whiskers",2},{"Sasha",14}
};
解决方法
如果不创建自己从List< ChildObject>派生的类,则不能这样做.根据李的回答.遗憾的是,扩展方法不考虑用于收集初始化器,否则这将起作用：
// This doesn't work,but it would if collection initializers checked
// extension methods.
using System;
using System.Collections.Generic;
public class ChildObject
{
public string Name { get; set; }
public int Age { get; set; }
}
public static class Extensions
{
public static void Add(this List<ChildObject> children,string name,int age)
{
children.Add(new ChildObject { Name = name,Age = age });
}
}
class Test
{
static void Main(string[] args)
{
List<ChildObject> children = new List<ChildObject>
{
{ "Sylvester",8 },{ "Whiskers",2 },{ "Sasha",14 }
};
}
}
