Question

C# does not support C/C++ macros. There are many Q&A related to this in StackOverflow but I couldn’t find answer to specific question.

Let say I am using code like one suggested at http://logging.apache.org/log4net/release/faq.html:

if(log.IsDebugEnabled) 
{
    log.Debug("Entry number: " + i + " is " + entry[i]);
}

This way to enable/disable logging has obvious drawbacks. In C++ I would use a macro like LOG(expr) to improve code readability and to have better control on ‘if(log.IsDebugEnabled)’ part of code (which is probably repeated thousand times in a project).

How can I achieve LOG(expr) – like result in C#?

Thanks!

Answer 1

Use new log4net XXXXFormat methods instead. They are implemented this way:

public virtual void DebugFormat(string format, params object[] args)
{
    if (this.IsDebugEnabled)
    {
       this.Logger.Log(declaringType, m_levelDebug, String.Format(format, args));
    }
}

Also you will have power of String.Format instead of simple concatenation of strings

log.DebugFormat("Entry number: {0} is {1}", i, entry[i]);