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Tuesday, February 5, 2013

Listeners : 5





Will the convoluted but you get used to it after a while so I passed now has the path to the application and then we can knew of the file stream defining it as a motive either open Hate giving it the name of trace log and you put that within the application path now the text listeners to find and we go ahead and add it to the listeners collection of the trace object each listener that you define is going to require different steps to set it up.

 Because it's going to be sending its information to different media different devices different locations whatever you create you should tear down to the cleanup method takes care of clearing out the listeners from the trace collection to the clear method takes care of clearing out all the listeners that are associated with the trace object and it closes down any of the listeners when you execute the close method it flushes any messages that have been cached and writes them to whatever output media is appropriate for that type of listener.

Can take a look at how to use these listeners over into the code behind my default.aspx page and scroll down to the right to listeners method this procedure shows how you can use the listeners and switches in your code the first thing it does is calls initialize listener method on the trace listen object in order to initialize listeners that news of the string builder which organ he used to build the string in order to display on the page at this point were ready to start outputting messages so we append some text to that string builder but we do it conditionally based on whether or not that Boolean.

 Switch is enabled or not if it is enabled then we went to string it is not enabled that we don't write the string and then we can do some conditional operations based on whether that's which is enabled in this case really do a trace right as well as a right line to the trace object the rest of the code within this procedure just test to see whether switches are enabled and outputs various messages this line of code shows how you can test to see whether the multi-switch list this line of code shows how you can test to see whether the multi-switch trace.

 Which is set to at least the error level and if it is then it's going to output a message it sent a warning it's good output that message and this one and if it is set to the info level or better than allow put this information to the big message of this procedure is to show how you can conditionally output different kinds of information based on whether a particular switch is set or sent to a specific level right at the end of the method we call the two string method of the string builder and that places that information within that message variable and then.

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