1.You use Visual Studio .NET to create a Windows-based data management application named MyApp. You implement the following code segment:Dim oSwitch As New _TraceSwitch(MySwitch， My TraceSwitch)Dim oWriter As New _IO.StreamWriter(IO.File.Open(c:MyApp.txt， _IO.FileMode.Append))Dim oListener As New _TextWriterTraceListener(oWriter)Trace.Listeners.Add(oListener)TryCustomerUpdate()Catch oEx As ExceptionTrace.WriteLineIf(oSwitch.TraceError， _Error: oEx.Message)FinallyTTrace.Listeners.Clear()oWriter.Close()oWriter = NothingEnd TryYou compile a debug version of the application and deploy it to a user's computer. The user reports errors， which are generated within the CustomerUpdate procedure.You decide to enable logging of the error messages generated by CustomerUpdate. You want to use the minimum amount of administrative effort.What should you do?A: Start the application with the following command line: /TRACE MySwitch 1.B: Start the application with the following command line: /d:TRACE=True.C: Start the application with the following command line: /XML switch=MySwitch value=1D: Create an environment variable on the user's computer. Name the variable MySwitch and assign it a value of 1.
发表于 2012-8-3 00:09:22
