c# - 循环遍历集合

Question

我有两个类(class)

class A
{
    public string something { get; set; }
    public IList<B> b= new List<B>();
}

class B
{
    public string else { get; set; }
    public string elseelse { get; set; }
}

我填充了一个名为 obj 的 A 类对象。我怎样才能遍历这个对象并打印值。我是否必须像这里的一个节目那样使用两个 foreach，还是有更好的方法？

 foreach (var z  in obj)
            {
                // print z.something;
                foreach (var x in z.b)
                {
                    // print x.elseelse;
                }
            }

Answer 1

var qry = from z in obj
          from x in z.b
          select new { z, x };
foreach (var pair in qry)
{
     Console.WriteLine("{0}, {1}", pair.z.something, pair.x.elseelse);
}

或

var qry = from z in obj
          from x in z.b
          select new { z.zomething, x.elseelse };
foreach (var item in qry)
{
     Console.WriteLine("{0}, {1}", item.something, item.elseelse);
}

或转换字符串:

var qry = from z in obj
          from x in z.b
          select z.zomething + ", " + x.elseelse;
foreach (string s in qry)
{
     Console.WriteLine(s);
}