使用 PostSharp 添加 OnException 属性

本文介绍了使用 PostSharp 添加 OnException 属性的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我正在尝试一些 AOP，似乎使用 .NET PostSharp 是可行的方法.

I am adventuring into some AOP and it seems with .NET PostSharp is the way to go.

我想在发生异常时对数据库做一些简单的日志记录.但是，我发现很难找到超出基础知识的 PostSharp 使用实例.我尝试了以下方法:

I want to do some simple logging to the db when an exception occurs. However I am finding it difficult to find any real solid examples of using PostSharp beyond the basics. I tried the following:

[Serializable]
public sealed class LogExceptionAttribute : ExceptionHandlerAspect
{
    public override void OnException(MethodExecutionEventArgs eventArgs)
    {
        //do some logging here
    }
}

然后将 [LogException] 属性附加到方法

And then attaching a [LogException] attribute to a method

但是我得到一个编译错误:

But I get a compile error:

Error   7   The type "CoDrivrBeta1.Classes.LogExceptionAttribute" or one of its ancestor should be decorated by an instance of MulticastAttributeUsageAttribute.    C:\work\CoDrivrBeta1\CoDrivrBeta1\EXEC  CoDrivrBeta1

我必须承认我对此很陌生，但这似乎是一个有趣的概念，我认为我只需要指出正确的方向

I have to confess I am very new to this, but it seems like an interesting concept, I think i just need to be pointed in the right direction

推荐答案

我通过扩展 OnExceptionAspect 使其工作:

I got it to work by extending the OnExceptionAspect:

[Serializable]
public sealed class LogExceptionAttribute : OnExceptionAspect
{
    public override void OnException(MethodExecutionEventArgs eventArgs)
    {
        //do some logging here
    }
}

原帖:

它想让你添加多播属性:

It wants you to add the Multicast attribute:

[Serializable]
[MulticastAttributeUsage(... Add Appropriate MulticastTargets ...)]
public sealed class LogExceptionAttribute : ExceptionHandlerAspect
{
    public override void OnException(MethodExecutionEventArgs eventArgs)
    {
        //do some logging here
    }
}

查看此链接了解更多详情:http://doc.postsharp.org/1.0/UserGuide/Laos/多播/Overview.html

See this link for more details:http://doc.postsharp.org/1.0/UserGuide/Laos/Multicasting/Overview.html

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