Enable Azure Website Application Diagnostics - azure-web-app-service

Question

I have a Windows Azure Website (built with ASP.NET Web Pages), and in the configuration have enabled "Application Diagnostics" for both Blob storage and file storage:
I've then added some Trace statements to a Razor page to test it out
#{
System.Diagnostics.Trace.TraceInformation("INFORMATION");
System.Diagnostics.Trace.TraceWarning("WARNING");
System.Diagnostics.Trace.TraceError("ERROR");
}
However, this results in no logs at all, either in the file system or the blob.
For good measure I attempted to add various settings to my web.config file (shown below), although from the documentation I read, it doesn't seem as though this should be necessary. But it makes no difference - I still see no diagnostic logs in the file system or the blob.
<system.web>
<compilation debug="true" targetFramework="4.5">
<assemblies>
<add assembly="Microsoft.Web.Infrastructure, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
</assemblies>
</compilation>
<trace enabled="true"/>
<httpRuntime targetFramework="4.5" />
</system.web>
<system.diagnostics>
<trace>
<listeners>
<add type="Microsoft.WindowsAzure.Diagnostics.DiagnosticMonitorTraceListener, Microsoft.WindowsAzure.Diagnostics, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"
name="AzureDiagnostics">
</add>
<add name="WebPageTraceListener"
type="System.Web.WebPageTraceListener, System.Web, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"/>
</listeners>
</trace>
</system.diagnostics>
Is there anything else I need to configure that I've missed? Could it be that this simply doesn't work at all for ASP.NET Web Pages projects?

Answer 1

To enable tracing from a razor page add the following to your web.config:
<system.codedom>
<compilers>
<compiler
language="c#;cs;csharp"
extension=".cs"
type="Microsoft.CSharp.CSharpCodeProvider, System, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"
compilerOptions="/define:TRACE"
warningLevel="1" />
</compilers>
</system.codedom>
Source: http://blogs.msdn.com/b/webdev/archive/2013/07/16/tracing-in-asp-net-mvc-razor-views.aspx
Note that tracing from your cs files should work without any changes to web.config.