在设置页面的.cshtml.cs文件中执行OnPost()方法之前，是否可以执行特定的代码块? [英] Is it possible to execute a specific block of code before the OnPost() method is executed in the .cshtml.cs file on a set pages?

问题描述

我要确定是否应该执行 OnPost()的页面很多.

I have a good number of pages I want to determine whether I should allow the OnPost() to be executed.

我想知道是否可以/在执行 OnPost()来潜在地阻塞 OnPost()调用之前执行代码块的最佳方式是?

I was wondering if you can/what the best way of executing a block of code before the OnPost() takes place to potentially block the OnPost() call is?

我知道您可以在每个 OnPost()的顶部进行检查，并调用一些对象/类方法来指示，但是还有其他方法可以在 OnPost()甚至是针对一组特定的页面执行的?

I know you could do a check at the top of every OnPost() and call some object/class method to dictate but is there some other way that would execute before the OnPost() is even executed for a specific set of pages?

(使用Razor Pages，而不是MVC)

(Using Razor Pages, not MVC)

推荐答案

可以在选择处理程序方法之后但在执行之前使用筛选器执行代码:

You can use a Filter to execute code after the handler method has been selected, but before it has been executed:

public override void OnPageHandlerSelected(PageHandlerSelectedContext context)
{
    if(context.HandlerMethod.MethodInfo.Name == nameof(OnPost))
    {
        // code placed here will only execute if the OnPost() method has been selected
    }
}

https://www.learnrazorpages.com/razor-pages/filters

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