Question

在我的更新操作中，我这样做：

[HttpPost]
public ActionResult Update()
{

  if(Request.Form["..."])
  {

  }
  ..

}

所以我抓取实体的ID，然后加载它，然后根据发布的表单值更新属性。

我正在使用MVC2。

当我阅读模型状态但不确定如何开始时，我该怎么做呢？

我想重构这一点。

更新

我的viewmodel看起来像：

public class SomeViewModel
{
   public User User {get; set;}
}

Answer 1

您应该定义一个视图模型，其中包含视图将发送的所有必要信息：

public class MyViewModel
{
    public int Foo { get; set; }

    [Required]
    public string Bar { get; set; }

    [Required]
    public DateTime? Baz { get; set; }
}

然后让控制器操作将此视图模型作为参数：

[HttpPost]
public ActionResult Update(MyViewModel model)
{
    if (!ModelState.IsValid) 
    {
        // validation failed (the user left the Bar field empty) =>
        // we redisplay the view so that he can fix the errors
        return View(model);
    }

    // at this stage we know that the model is valid =>
    // we could do some processing. The model.Foo and model.Bar
    // properties will contain the values entered by the user in the 
    // corresponding form fields so that you don't need to fetch them
    // manually from the Request. The default model binder will take
    // care of this

    ...
}

正确处理MVC中的回发

1 个答案: