使用带有 TraceAttribute 的 PostSharp 以使用 HttpContext 的 SessionID 进行日志记录 [英] Using PostSharp with TraceAttribute for logging with HttpContext's SessionID

问题描述

我在每个类上使用带有 TraceAttribute 的 PostSharp 以写入日志文件.一个新的要求是能够在每个日志条目前面加上 SessionID.

I'm using PostSharp with the TraceAttribute on each class in order to write to log files. A new requirement is to be able to prepend each log entry with the SessionID.

PostSharp 似乎无法以这种方式工作.我尝试了两种对我有意义的方法，但都不起作用.

PostSharp doesn't seem to be able to work this way though. I've tried the two approaches that made sense to me and neither work.

尝试 #1

我向 TraceAttribute 构造函数添加了一个字符串参数，以供 OnEntry、OnExit 和 OnException<传入和使用/code> 方法.

I added a string parameter to the TraceAttribute constructor to be passed in and used by the OnEntry, OnExit and OnException methods.

private readonly string _sessionID;

public TraceAttribute(string sessionID)
{
    _sessionID = sessionID;
    logger = new Logger();
}

public override void OnExit(MethodExecutionArgs args)
{
    logger.LogMethodExit(string.Format("Session {0} Exiting {1}.{2}", _sessionID, args.Method.DeclaringType.FullName, args.Method.Name));
}

我的控制器最初是用 [Trace] 属性装饰的，我修改了这种方法......

My controllers were decorated with the [Trace] attribute originally and I modified to this approach...

[Trace(HttpContext.Session.SessionID)]

这不起作用，因为 HttpContext 在静态上下文中不可用.

This doesn't work as the HttpContext is not available in a static context.

所以这个想法是不可能的.

So that idea is out the window.

尝试#2

所以我的下一个尝试是简单地为 TraceAttribute...

So my next try was to simply create the sessionId variable locally to each method in the TraceAttribute...

public override void OnEntry(MethodExecutionArgs args)
{
    var sessionID = HttpContext.Current.Session.SessionID;
    logger.LogMethodEntry(string.Format("Session {0} Entering {1}.{2}", sessionID, args.Method.DeclaringType.FullName, args.Method.Name));
}

这也不起作用，HttpContext 尚不可用，并且在我运行解决方案后在运行时是一个 null 对象..

This doesn't work either as again, the HttpContext is not yet available and is a null object at runtime as soon I run the solution..

尝试 #3

public override void OnEntry(MethodExecutionArgs args)
{
    string sessionID = "Not initialized";
    if (HttpContext.Current.Session.SessionID != null)
        sessionID = HttpContext.Current.Session.SessionID;
    logger.LogMethodEntry(string.Format("Session {0} Entering {1}.{2}", sessionID, args.Method.DeclaringType.FullName, args.Method.Name));
}

有什么办法可以将会话信息放入一个以这种方式用 PostSharp 编织的 TraceAttribute 中?一些可以实现此目标的解决方法?

Is there any way to get the session information into a TraceAttribute that is weaved with PostSharp in this manner? Some workaround that can accomplish this goal?

推荐答案

成功了，我错过了在 web.config 中提交的会话.

Got it working, I was missing my session being turned in in web.config.

将此行添加到配置中，现在可以正常工作了.

Added this line to config and it works fine now.

<sessionState mode="InProc" cookieless="false" timeout="20"/>

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