C# 用于在初始化时创建对象的API控制器

我目前有一个名为“People”的API控制器，它继承了ApiController

控制器中有多个

[HttpPost]

/

[HttpGet]

方法。每个都使用相同的启动。即：

[HttpPost]
[Route(@"{personID}"]
public async SavePerson(int personID, [FromBody] PersonObject sentPerson) {
    // Here is the initialization method that goes and gets a person
    // dependent on if they have a record already
    var getPerson = _personRepo.GetPerson(personID); 
    // some code here
}

每个方法在存储库中使用相同的

getPerson

方法。但是，在

MVC控制器中

可以调用多个

覆盖

，例如

OnActionExecuting

等

在初始化

APIController

时，是否有一种方法可以运行：

var getPerson = _personRepo.GetPerson(personID);

---

在运行“People”类中的任何方法之前？这意味着我不必为每个新的

路线重复重写上述方法

您可以为类创建

Person

属性和设置该属性的

ActionFilter

：

ActionFilter:

public class MyActionFilter : System.Web.Http.Filters.ActionFilterAttribute
{
    public override void OnActionExecuting(System.Web.Http.Controllers.HttpActionContext actionContext)
    {
        base.OnActionExecuting(actionContext);

        //Add other criterias and required null checkings here

        //Find the person id from action arguments
        int personID = Convert.ToInt32(actionContext.ActionArguments["personID"]);
        var _personRepo = new PersonRepository();

        //Get the controller instance that is running and set the Person property
        ((People)actionContext.ControllerContext.Controller).Person = _personRepo.GetPerson(personID); 
    }
}

[MyActionFilter]
public class ValuesController : ApiController
{
    public Person Person { get; set; }

    //your actions
}

控制器：

public class MyActionFilter : System.Web.Http.Filters.ActionFilterAttribute
{
    public override void OnActionExecuting(System.Web.Http.Controllers.HttpActionContext actionContext)
    {
        base.OnActionExecuting(actionContext);

        //Add other criterias and required null checkings here

        //Find the person id from action arguments
        int personID = Convert.ToInt32(actionContext.ActionArguments["personID"]);
        var _personRepo = new PersonRepository();

        //Get the controller instance that is running and set the Person property
        ((People)actionContext.ControllerContext.Controller).Person = _personRepo.GetPerson(personID); 
    }
}

[MyActionFilter]
public class ValuesController : ApiController
{
    public Person Person { get; set; }

    //your actions
}

然后用

[MyActionFilter]

---

然后，在任何用

[MyActionFilter]

修饰的操作中，您可以使用

this.Person

您应该看看ActionFilter如何使用控制器的构造函数？