TraceError Property
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TraceSwitch.TraceError Property

 

Gets a value indicating whether the switch allows error-handling messages.

Namespace:   System.Diagnostics
Assembly:  System (in System.dll)

Public ReadOnly Property TraceError As Boolean

Property Value

Type: System.Boolean

true if the Level property is set to TraceLevel.Error, TraceLevel.Warning, TraceLevel.Info, or TraceLevel.Verbose; otherwise, false.

You can use the TraceError, TraceWarning, TraceInfo, and TraceVerbose properties in conjunction with the Debug and Trace classes to emit all messages with a specified importance or greater. When the Level property is set to the highest importance, TraceLevel.Error, Error , only error-handling messages are emitted.

The following code example creates a new TraceSwitch and uses the switch to determine whether to emit error messages. The switch is created at the class level. MyMethod writes the first error message if the Level property is set to TraceLevel.Error or higher. However, MyMethod does not write the second error message if the Level is less than TraceLevel.Verbose.

' Class-level declaration.
' Create a TraceSwitch to use in the entire application. 
Private Shared mySwitch As New TraceSwitch("General", "Entire Application")    

Public Shared Sub MyMethod()
    ' Write the message if the TraceSwitch level is set to Error or higher.
    If mySwitch.TraceError Then
        Console.WriteLine("My error message.")
    End If 
    ' Write the message if the TraceSwitch level is set to Verbose.
    If mySwitch.TraceVerbose Then
        Console.WriteLine("My second error message.")
    End If
End Sub

Public Shared Sub Main()
    ' Run the method that prints error messages based on the switch level.
    MyMethod()
End Sub

.NET Framework
Available since 1.1
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