Debug::Fail Method (String^, String^)
Emits an error message and a detailed error message.
Assembly: System (in System.dll)
public: [ConditionalAttribute("DEBUG")] static void Fail( String^ message, String^ detailMessage )
Parameters
- message
-
Type:
System::String^
A message to emit.
- detailMessage
-
Type:
System::String^
A detailed message to emit.
The default behavior is that the DefaultTraceListener outputs the message to a message box when the application is running in user interface mode and to the TraceListener instances in the Listeners collection.
Note |
|---|
The display of the message box is dependent on the presence of the DefaultTraceListener. If the DefaultTraceListener is not in the Listeners collection, the message box is not displayed. The DefaultTraceListener can be removed by the <clear> Element for <listeners> for <trace>, the <remove> Element for <listeners> for <trace>, or by calling the Clear method on the Listeners property (System.Diagnostics.Trace.Listeners.Clear()). |
You can customize this behavior by adding a TraceListener to, or removing one from, the Listeners collection.
The following example uses the Fail method to print a message during exception handling.
catch ( Exception^ e ) { #if defined(DEBUG) Debug::Fail( "Cannot find SpecialController, proceeding with StandardController", "Setting Controller to default value" ); #endif }
You can also use the Fail method in a switch statement.
Available since 10
.NET Framework
Available since 1.1
