获取访问Property的方法名并读取属性值

Question

我想将 PostSharp 方面属性放在一个属性上，并知道从哪个方法访问属性以及当时它有什么值。 PostSharp 可以做到这一点吗？

示例应阅读

static MyClass
{
[PostSharpAtrribute]
public string OutputFormat { get; set; }
}

public void Method1
{
MyClass.Instance.OutputFormat = "1";
}

public void Method2
{
MyClass.Instance.OutputFormat = "2";
}

public void Method3
{
MyClass.Instance.OutputFormat = "3";
}

PostSharp Aspect

Method "Method1" executed, property has value OutputFormat = 1
Method "Method2" executed, property has value OutputFormat = 2
Method "Method3" executed, property has value OutputFormat = 3

Answer 1

要获取当前值（在更改之前，您只需使用 Args.Value，因为 Set 尚未发生。

[Serializable] 
public class MyPropertyAspect: LocationInterceptionAspect 
{ 
    public override void OnSetValue(LocationInterceptionArgs args) 
    { 
            object current = args.Value; //Set has not happened, remember this is an interception
            args.ProceedSetValue(); 

    }           
}

请参阅 http://www.sharpcrafters.com/blog/post/Day-7-Interception-Aspects-e28093-Part-1.aspx 和 http://www.sharpcrafters.com/blog/post/Day-8-Interception-Aspects-e28093-Part-2.aspx

要确定调用者，您需要遍历调用堆栈使用 StackTrace http://msdn.microsoft.com/en-us/library/system.diagnostics.stacktrace.aspx

var st = new StackTrace();
st.GetFrame(1).GetMethod().Name; //Might also be frame 2

或者只是在你的方法上添加一个跟踪方面（IMO 会比反映更好）调用堆栈）http://www.sharpcrafters.com/blog/post/Day-4-OnMethodBoundaryAspect.aspx