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TraceSwitch.TraceWarning Property

Gets a value indicating whether the switch allows warning messages.

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

'Declaration
Public ReadOnly Property TraceWarning As Boolean

Property Value

Type: System.Boolean
true if the Level property is set to 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 TraceLevel.Warning, warnings and 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.Warning or higher. However, MyMethod does not write the second error message when 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 Warning or higher. 
        If mySwitch.TraceWarning 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

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
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