Provides a multilevel switch to control tracing and debug output without recompiling your code.
Assembly: System (in System.dll)
Gets the custom switch attributes defined in the application configuration file.(Inherited from Switch.)
Gets a description of the switch.(Inherited from Switch.)
Gets a name used to identify the switch.(Inherited from Switch.)
Gets or sets the trace level that determines the messages the switch allows.
Gets or sets the current setting for this switch.(Inherited from Switch.)
Gets a value indicating whether the switch allows error-handling messages.
Gets a value indicating whether the switch allows informational messages.
Gets a value indicating whether the switch allows all messages.
Gets a value indicating whether the switch allows warning messages.
Gets or sets the value of the switch.(Inherited from Switch.)
Determines whether the specified object is equal to the current object.(Inherited from Object.)
Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.)
Serves as the default hash function. (Inherited from Object.)
Gets the custom attributes supported by the switch.(Inherited from Switch.)
Updates and corrects the level for this switch.(Overrides Switch.OnSwitchSettingChanged().)
Returns a string that represents the current object.(Inherited from Object.)
You can use a trace switch to filter out messages based on their importance. The TraceError, TraceWarning, TraceInfo, and TraceVerbose properties to test the level of the switch. The Level property gets or sets the switch's TraceLevel.class provides the
You can set the level of athrough the application configuration file and then use the configured level in your application. Alternately, you can create a in your code and set the level directly to instrument a specific section of code.
To configure a, edit the for your application. In this file, you can add or remove a switch, set a switch's value, 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="1" /> </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 . The line <add name="mySwitch" value="Error" /> is equivalent to <add name="mySwitch" value="1" />.
In your application, you can use the configured switch level by creating awith the same name, as shown in the following example:
By default, the switch Level property is set using the value specified in the configuration file. If the TraceSwitch constructor cannot find initial switch settings in the configuration file, the Level of the new switch defaults to TraceLevel.Off.
You must enable tracing or debugging to use a switch. The following syntax is compiler specific. If you use compilers other than C# or Visual Basic, refer to the documentation for your compiler.
To enable debugging in C#, add the /d:DEBUG flag to the compiler command line when you compile your code, or add #define DEBUG to the top of your file. In Visual Basic, add the /d:DEBUG=True flag to the compiler command line.
To enable tracing in C#, add the /d:TRACE flag to the compiler command line when you compile your code, or add #define TRACE to the top of your file. In Visual Basic, add the /d:TRACE=True flag to the compiler command line.
To improve performance, you can makemembers static in your class.
The following code example creates a new 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.and uses the switch to determine whether to print error messages. The switch is created at the class level.
Available since 1.1
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.