C# method parameters values logging automatization

Question

I am logging method name and its parameters values as shown below (pseudo code):

class TestClass
{
    void Method(int Param1, int Param2, int Param3)
    {
       _logger->AddLogEntry("Method",Param1, Param2, Param3);
      ....
      <some work here>
      ....
    }

    void AnotherMethod(int Param)
   {
       _logger->AddLogEntry("AnotherMethod",Param);

      ....
      <some work here>
      ....
   }
  .....
}

I am a bit confused about need to write all parameters manually as input parameters in AddLogEntry method. Its probably to forget one or more parameters when signature of loggable method changed. Is there any way to automate this step. I mean take all values of all parameters of current method. It would be great if I could take also name of the current method and pair <param name> - <value>

You can either write them manually, or preprocess your code before compilation so that a tool writes them out for you, or you can do that at runtime and incur a significant cost on every function call. Your choice. — Jon
– Jon, Commented Jul 12, 2013 at 15:05

Yair Nevet · Accepted Answer · 2013-07-12 15:26:27Z

1

You can use PostSharp for logging operations, it's work by the Aspect-oriented programming model.

It's based on attributes and reflection.

To be more specifically, take a look at their LogAttribue documentation.

Here is a simple example from their website for logging:

[assembly:  
Log(AttributeTargetTypes="Contoso.Crm.Orders.*", 
    AttributeTargetMemberAttributes = MulticastAttributes.Public)]  

public class OrderFulfillmentService  
{ 
    public bool IsValid( Order order )  
    { 
        if ( order.Lines.Count == 0 ) 
          return false; 

        if ( order.Amount < 0 ) 
          return false; 

        return true; 

    } 
}

edited Jul 12, 2013 at 15:26

answered Jul 12, 2013 at 15:02

Yair Nevet

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1 Comment

Anton Semenov Over a year ago

just tryed it out. I like it very much, unfortunately logging feature is only available in paid version. anyway thank you so much for advice! Now its clear for me what way I should move

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