Listeners : 3

 A variety of trace statements to use a Boolean switch you need to create an instance of your code the instance should have the same name as one of the switch is defined in the web.config file is the switch name in your code doesn't match any switches in web.config the net switches disabled the trace switch class let.

You enable trace switch for various tracing levels so that the trace messages specified for that level in all levels below it appear if you disable switch the trace messages do not appear and finally there's a source switch this class provides a multilevel switch that lets you control tracing and debug output this switch is mainly used as the object behind the switch property of the trace source class in the trace switch class provides a lot more granularity.

Than the simple on-off Boolean switch class and contains various tracing levels you can specify off which outputs no messages error which outputs only error messages warning for both error and warning messages info for informational warning at error messages and verbose which outputs all messages to each of these tracing levels includes all of the messages at the defined level as well as the lower level reading up in the list and when your code checks a trace switch for particular level the switch returns true.

If it is been sent to that level or any level above it which means that if it's true you should output that message right one more thing to talk about men will look at how this is implemented in code switches are configured in the switches section within the system.diagnostics element within web.config so I have the system.diagnostics element which is a child switches and that I define whatever switches that I want to include and these names are custom names the name attribute is any name that you define.

This can be the name that you referred to within your code and the value is one of the values is appropriate for the type of switch so for example you can set the Boolean switch to 01 and the multi-switch to value from 04 relating to the particular level that you want zero first off and four refers to verbose okay let's go ahead and take a look at the sample application that implement some of these features the default for deployed application is to have all trace switches disabled if you have a problem with the application.

Then you can edit the web.config file to flip the switches and activate any trace listeners you may have in your code when the code executes and creates an instance of switch object for the first time it checks the web.config file to see the level of trace information you've configured if any and unconditionally produces output based on the settings it finds there so the first thing we need to do is modify the web.config, reduce other config file and steal.