Gets or sets the trace level that determines the messages the switch allows.
Assembly: System (in System.dll)
To set the level of your TraceSwitch, edit the configuration file that corresponds to the name of your application. In this file, you can add a switch and set its value, remove a switch, or clear all the switches previously set by the application. The configuration file should be formatted like the following example:
<configuration> <system.diagnostics> <switches> <add name="mySwitch" value="0" /> <add name="myNewSwitch" value="3" /> <remove name="mySwitch" /> <clear/> </switches> </system.diagnostics> </configuration>
In the .NET Framework version 2.0, you can use text to specify the value for a switch. For example, true for a BooleanSwitch or the text representing an enumeration value, such as Error for a TraceSwitch. The line <add name="mySwitch" value="Error" /> is equivalent to <add name="mySwitch" value="1" />.
The following code example creates a new TraceSwitch and uses the switch to determine whether to print error messages. The switch is created at the class level. MyMethod writes the first error message if the property is set to TraceLevel.Error or higher. However, MyMethod does not write the second error message if the is less than TraceLevel.Verbose.
' Class-level declaration. ' Create a TraceSwitch to use in the entire application. Private Shared mySwitch As New TraceSwitch("mySwitch", "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
Available since 1.1