Tracing : 2

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            behind that button only need to do in order to output a message to the trace is to use the trace object which is provided by the page object that this class inherits from in order to implement create an ASP.net page, so we need to do is use either the right or worn method in order to output some sort of string sets an example of one of the overloads and then we can also use the second overload to write out both a category as well as a message then run the application again and I'll click on this link button and just post back to the page itself.

 But now I can scroll down and see that we've added some additional custom information is the trace right message and the trace worn message which don't have any category and then here are the second set of messages that have a category assigned so it's very easy to add additional information and most often you probably want to categorize it seek and very quickly go to the specific information about your application because depending on how your instrument.

 Your application with these kinds of statements it can output an awful lot of data can also create whatever categories you want so for example maybe different set of methods within your page have different categories and it's a great way to be able to scan the information besides the custom trace right and trace worn messages.

The trace information is a list of trace messages that are generated automatically as the application executes the messages are grouped into several tables the group specific types of trace information you can see were ASP.net adds Rose for the events that are raised during the lifecycle of the page and we saw that in an earlier example.

The page also displays information about the controls used by the page this is a real handy feature where you want to look at the characteristics of the controls particularly how much they are contributing to view state if you have bloated you state trace makes it very easy to find the offenders you may have one control that doesn't even need to use the state but is generating a lot of data within.

The state does get information about any session state variables and cookies that you use their included within the HTTP request you can examine the various request headers session variables and on and on as a lot of information there and it's worthwhile exploring the trace for variety of pages to the get a feel for.

How to best use that? we really need to use it in order to debug application when you had tracing code to your own code you can use the trace context.is enabled property in order to determine whether tracing is enabled before you execute any right or worn methods this really is a necessary because you turn trace on an offer an entire page and if tracing is not an enabled any right and worn statements.