问题是从你的行动方法的参数：

The problem is from your action method parameter:

[HttpPost]
public ActionResult SaveAddress(AddressViewModel addressViewModel)

当您使用 JSON.stringify（），你发送一个字符串到控制器，而不是一个对象！所以，你需要做一些工作才达到你的目标：

As you use JSON.stringify(), you send a string to your controller, not an object! So, you need to do some works to achive your goal:

1）改变你的操作方法parametter：

1) Change your action method parametter:

[HttpPost]
public ActionResult SaveAddress(string addressViewModel)

2）反序列化字符串对象 - 这是AddressViewModel：

2) Deserialize that string to an object - that is AddressViewModel:

IList<AddressViewModel> modelObj = new 
JavaScriptSerializer().Deserialize<IList<AddressViewModel>>(addressViewModel);

所以，你最终的操作方法应该是这样的：

So, your final action method should be like the following:

[HttpPost]
public ActionResult SaveAddress(string addressViewModel)
{
    IList<AddressViewModel> modelObj = new 
    JavaScriptSerializer().Deserialize<IList<AddressViewModel>>(addressViewModel);

    // do what you want with your model object ...
}