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swdev:dotnet:debugging [2011/03/25 09:44]
smayr 		swdev:dotnet:debugging [2011/08/30 16:34] (current)
smayr [Debugging]
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 == Debugging == == Debugging ==
 +
 +  * Enable WPF debug output. In Visual Studio, Options > Debugging > Output Window > WPF Trace Settings > Data Binding > All.
 +  * Add a high TraceLevel to your binding: <code csharp>System.Diagnostics.PresentationTraceSources.SetTraceLevel(NewBinding, System.Diagnostics.PresentationTraceLevel.High);</code>
 +  * Run application, and review log in "Output" tab in Visual Studio.
 +  * Add ''System.Diagnostics'' entry to ''app.exe.config''.  See:
 +    * [[swdev:dotnet:debugging|Debugging for .NET]]
 +    * [[http://www.thejoyofcode.com/System.Diagnostics_hidden_SourceLevels.aspx|The Joy of Code: System.Diagnostics Hidden SourceLevels]] 
 +    * [[http://msdn.microsoft.com/en-us/library/aa345169.aspx|MSDN: PresentationTraceSources Class]]
 +    * [[http://msdn.microsoft.com/en-us/library/system.diagnostics.presentationtracesources.settracelevel.aspx|MSDN: SetTraceLevels]]
 +    * [[http://msdn.microsoft.com/en-us/library/6w20x90k.aspx|MSDN: EventLog.WriteEntry method]]
 +  * [[http://stackoverflow.com/questions/4026543/is-there-a-good-tool-for-debugging-xamls-databinding-behavior-errors-at-runtim|Tools for Debugging Data Binding at runtime]]
 +  * [[http://bea.stollnitz.com/blog/?p=52|Bea Stollnitz: How can I debug WPF bindings?]]
  
 == Using System.Diagnostics == == Using System.Diagnostics ==
  
 +=== Configuration File ===
 Add the following to the ''//app//.exe.config'' file (must reside in the same folder and the ''//app//.exe''): Add the following to the ''//app//.exe.config'' file (must reside in the same folder and the ''//app//.exe''):
 <code xml> <code xml>
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       <source name="srcMyAppDebug" switchName="SourceSwitch" >       <source name="srcMyAppDebug" switchName="SourceSwitch" >
         <listeners>         <listeners>
-          <add name="textListener" />+          <add name="myTextListener" />
         </listeners>         </listeners>
       </source>       </source>
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 </configuration> </configuration>
 +</code>
 +
 +The ''SourceLevels'' used by the ''SourceSwitch'' (''//app//.exe.config'' configuration file) could be any of these:
 +<code csharp>
 +public enum SourceLevels
 +{
 +    All             = -1,
 +    Off             = 0,
 +    Critical        = 1,
 +    Error           = 3,
 +    Warning         = 7,
 +    Information     = 15,
 +    Verbose         = 31,
 +    ActivityTracing = 65280,
 +}
 </code> </code>
  
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   </listeners>   </listeners>
 </code> </code>
 +
 +=== Writing Events ===
  
 To write to the event log: To write to the event log:
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 Alternatively, and more flexible: Alternatively, and more flexible:
 <code csharp> <code csharp>
-TraceSource srcMyApp = new TraceSource("srcMyAppp");+TraceSource srcMyApp = new TraceSource("srcMyAppDebug");
 srcMyApp.TraceInformation("Some operation here: Hello World"); srcMyApp.TraceInformation("Some operation here: Hello World");
 srcMyApp.TraceEvent(TraceEventType.Error, 0, "Error: Something failed here."); srcMyApp.TraceEvent(TraceEventType.Error, 0, "Error: Something failed here.");
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 </code> </code>
  
-The ''SourceLevels'' used by the ''SourceSwitch'' (''//app//.exe.config'' configuration file) could be any of these:+Another example:
 <code csharp> <code csharp>
-public enum SourceLevels+using System.Diagnostics; 
 + 
 +private void WriteToEventLog(string message)
 { {
-    All             = -1, +  string cs = "srcMyApp"; 
-    Off             = 0, +  EventLog elog = new EventLog(); 
-    Critical        = 1, + 
-    Error           = 3, +  if (!EventLog.SourceExists(cs)) 
-    Warning         = 7, +  { 
-    Information     = 15, +     EventLog.CreateEventSource(cs, cs); 
-    Verbose         = 31, +  } 
-    ActivityTracing = 65280,+ 
 +  elog.Source = cs; 
 +  elog.EnableRaisingEvents = true; 
 +  elog.WriteEntry(message); 
 +} 
 +</code> 
 + 
 +Another example (by Microsoft): 
 +<code csharp> 
 +using System; 
 +using System.Diagnostics; 
 +using System.Threading; 
 + 
 +class MySample{ 
 + 
 +    public static void Main(){ 
 + 
 +        // Create the source, if it does not already exist. 
 +        if(!EventLog.SourceExists("MySource")) 
 +        { 
 +             //An event log source should not be created and immediately used. 
 +             //There is a latency time to enable the source, it should be created 
 +             //prior to executing the application that uses the source. 
 +             //Execute this sample a second time to use the new source. 
 +            EventLog.CreateEventSource("MySource", "MyNewLog"); 
 +            Console.WriteLine("CreatedEventSource"); 
 +            Console.WriteLine("Exiting, execute the application a second time to use the source."); 
 +            // The source is created.  Exit the application to allow it to be registered. 
 +            return; 
 +        } 
 + 
 +        // Create an EventLog instance and assign its source. 
 +        EventLog myLog = new EventLog(); 
 +        myLog.Source = "MySource"; 
 + 
 +        // Write an informational entry to the event log.     
 +        myLog.WriteEntry("Writing to event log."); 
 + 
 +    }
 } }
 </code> </code>
swdev/dotnet/debugging.1301060660.txt.gz · Last modified: 2011/03/25 09:44 by smayr
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