asp.net-mvc 如何将变量传递给 ASP.NET MVC 应用程序中的自定义 ActionFilter
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How do I pass variables to a custom ActionFilter in ASP.NET MVC app
提问by divyanshm
I have a controller in my MVC app for which I'm trying to log details using a custom ActionFilterAttribute, by using the onResultExecuted method.
我的 MVC 应用程序中有一个控制器，我尝试使用 onResultExecuted 方法使用自定义 ActionFilterAttribute 为其记录详细信息。
I read this tutorialto understand and write my own action filter. The question is how do I pass variables from the controller to the action filter?
我阅读本教程是为了理解和编写我自己的动作过滤器。问题是如何将变量从控制器传递到动作过滤器？
- I want to get the input variables with which a controller is called. Say, the username/user ID.
- If (in some situations) an exception is thrown by any controller method, I would want to log the error too.
- 我想获取调用控制器的输入变量。比如说，用户名/用户 ID。
- 如果（在某些情况下）任何控制器方法抛出异常，我也想记录错误。
The controller -
控制器——
[MyActionFilter]
public class myController : ApiController {
public string Get(string x, int y) { .. }
public string somemethod { .. }
}
The action filter -
动作过滤器 -
public class MyActionFilterAttribute : ActionFilterAttribute {
public override void onActionExecuted(HttpActionExecutedContext actionExecutedContext) {
// HOW DO I ACCESS THE VARIABLES OF THE CONTROLLER HERE
// I NEED TO LOG THE EXCEPTIONS AND THE PARAMETERS PASSED TO THE CONTROLLER METHOD
}
}
I hope I have explained the problem here. Apologies if I'm missing out some basic objects here, I'm totally new to this.
我希望我已经在这里解释了这个问题。抱歉，如果我在这里遗漏了一些基本对象，我对此完全陌生。
回答by Imad Alazani
Approach - 1
方法 - 1
Action Filter
动作过滤器
public class MyActionFilter : ActionFilterAttribute
{
public override void OnActionExecuted(ActionExecutedContext filterContext)
{
base.OnActionExecuted(filterContext);
}
}
Action Method
动作方法
[MyActionFilter]
public ActionResult Index()
{
ViewBag.ControllerVariable = "12";
return View();
}
If you pay attention to the screenshot, you can see the ViewBaginformation
如果你注意截图，你可以看到ViewBag信息
Approach - 2
方法 - 2
Action Filter
动作过滤器
public class MyActionFilter : ActionFilterAttribute
{
//Your Properties in Action Filter
public string Property1 { get; set; }
public string Property2 { get; set; }
public override void OnActionExecuting(ActionExecutingContext filterContext)
{
base.OnActionExecuting(filterContext);
}
}
Action Method
动作方法
[MyActionFilter(Property1 = "Value1", Property2 = "Value2")]
public ActionResult Index()
{
return View();
}
