在每个控制器动作之前/之后执行代码 [英] Execute code before/after every controller action

问题描述

我有一个要记录事件的ASP.NET MVC应用程序.我已经有了一个Log类，其中包含我需要的所有工具，但是我必须实例化并显式关闭它(因为它会打开文件，所以我不能依赖于GC).我的动作如下所示:

I have an ASP.NET MVC application for which I want to log events. I have already a Log class with all the tools I need, but I have to instantiate and to close it explicitly (because it opens files, so I can't depend on the GC). My actions would look like this:

public ActionResult MainMenu()
{
    CreateLog();

    // Do controller stuff
    Log(message);
    // Do more controller stuff

    CloseLog();
    return View(mModel);
}

或者我可以使用一个using块，但是它的介入性要小一些，并且会给异常处理带来麻烦.我已经读过有关ActionFilters的信息，可以用来创建和关闭Log，但是随后我将无法访问该方法内部的Log对象.

Or I could use a using block, but it would be just a little less intrusive AND it would create troubles with exception handling. I've read about ActionFilters, which I could use to create and close my Log, but then I would have no way to access the Log object inside the method.

您有什么建议吗?如何避免重复代码?

Do you have any suggestion? How could I avoid having to repeat the code?

推荐答案

如果其他建议不起作用，或者您需要做的不仅仅是日志记录，还请注意您可以覆盖OnActionExecuting方法(通常在重用的基类).

If the other suggestions don't work or if you need to do things other than just logging also be aware that you can override the OnActionExecuting method (often in a base class for reuse).

// Custom controller.
public class CustomController : Controller
{
    protected override void OnActionExecuting(ActionExecutingContext filterContext)
    {
        // Do whatever here...
    }
}

// Home controller.
public class HomeController : CustomController
{
    // Action methods here...
}

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