How can I add simple tracing in C

Question

I want to introduce some tracing to a C  application I am writing  Sadly  I can never really remember how it works and would like a tutorial with reference qualities to check up on every now and then  It should include   App config   Web config stuff to add for registering TraceListeners how to set it up in the calling application  Do you know the   ber tutorial that we should link to   Glenn Slaven pointed me in the right direction  Add this to your App config Web config inside  lt configuration  gt    lt system diagnostics gt       lt trace autoflush  quot true quot  gt         lt listeners gt           lt add type  quot System Diagnostics TextWriterTraceListener quot  name  quot TextWriter quot               initializeData  quot trace log quot    gt         lt  listeners gt       lt  trace gt   lt  system diagnostics gt   This will add a TextWriterTraceListener that will catch everything you send to with Trace WriteLine  etc   DanEsparza pointed out that you should use Trace TraceInformation  Trace TraceWarning and Trace TraceError instead of Trace WriteLine  as they allow you to format messages the same way as string Format  Tip  If you don t add any listeners  then you can still see the trace output with the Sysinternals program DebugView  Dbgview exe

User · Answer

I followed around five different answers as well as all the blog posts in the previous answers and still had problems. I was trying to add a listener to some existing code that was tracing using the TraceSource.TraceEvent(TraceEventType, Int32, String) method where the TraceSource object was initialised with a string making it a 'named source'.

For me the issue was not creating a valid combination of source and switch elements to target this source. Here is an example that will log to a file called tracelog.txt. For the following code:

TraceSource source = new TraceSource("sourceName");
source.TraceEvent(TraceEventType.Verbose, 1, "Trace message");

I successfully managed to log with the following diagnostics configuration:

<system.diagnostics>
    <sources>
        <source name="sourceName" switchName="switchName">
            <listeners>
                <add
                    name="textWriterTraceListener"
                    type="System.Diagnostics.TextWriterTraceListener"
                    initializeData="tracelog.txt" />
            </listeners>
        </source>
    </sources>

    <switches>
        <add name="switchName" value="Verbose" />
    </switches>
</system.diagnostics>

User · Answer

DotNetCoders has a starter article on it  http   www dotnetcoders com web Articles ShowArticle aspx article 50  They talk about how to set up the switches in the configuration file and how to write the code  but it is pretty old  2002   There s another article on CodeProject  A Treatise on Using Debug and Trace classes  including Exception Handling  but it s the same age  CodeGuru has another article on custom TraceListeners  Implementing a Custom TraceListener

[c#] How can I add (simple) tracing in C#?

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