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Depending on your setup (or hosting environment), you might find that Sinatra offers a nicer way to Tip

Figure 6-19 When you connect to an FTP site using Windows Explorer, you can manage files and folders directly. The site icon in the Navigation disappears when you close the window.

public interface IObjectReference { Object GetRealObject(StreamingContext context); }

Whenever you use any of these four attributes, the method you define must take a single StreamingContext parameter (discussed in the Streaming Contexts section later in this chapter) and return void . The name of the method can be anything you want it to be . Also, you should declare the method as private to prevent it from being called by normal code; the formatters run with enough security that they can call private methods . Note When you are serializing a set of objects, the formatter first calls all of the objects methods

them access to the Marketing folder. Additionally, NTFS permissions deny them access, because the NTFS permissions grant access only to John and Sam.

Figure 7-7: Exceptions dialog box The Exceptions dialog box is a little confusing in that the native exceptions are split between two top level nodes, C++ Exceptions and Win32 Exceptions The default settings are that the debugger will stop only on Control-C (0x40010005) and Control-Break (0x40010008) exceptions when debugging console applications To tell the debugger to stop whenever any particular exception occurs, select the exception in the tree and, in the When The Exception Is Thrown (that is, on the first chance exception) group, select Break Into The Debugger The glyph on the selected item will change to a large red ball with an X in it In the dialog box, smaller grey balls denote exceptions that inherit their settings from the parent A larger gray ball indicates the option is to continue on first chance exceptions.

It s often very useful to be able to govern output caching . For example, some pages present exactly the same content to all the users who access the page . In that case, caching a single version of the content is just fine . However, there are other circumstances in which sending the same content to everyone is inappropriate . The easiest way to control the behavior of output caching is to modify the OutputCache directive . One obvious case in which controlling the cache is important is while caching different versions of content for different browsers making requests . Different browsers often have different capabilities . If you send content that requires a feature not supported by all browsers, some browsers making requests will get a response that they re unable to handle

if ( !(this.IsPostBack) ) { CustomerID=System.Convert.ToInt32( (string)Request["CustomerID"]); doDataBind(); } if ( CustomerID!=0 ) { btnDelete.Visible=true; } else { btnDelete.Visible=false;

Ports These allow or disallow a protocol through a speci c port or set of ports. Prede ned These include several precon gured and well-known services and

turns off your complier s ability to check for type mismatches and therefore creates a hole in your defensive-programming armor. A program that requires many type casts probably has some architectural gaps that need to be revisited. Redesign if that s possible; otherwise, try to avoid type casts as much as you can.

MessageRaised WarningRaised ErrorRaised BuildStarted BuildFinished ProjectStarted ProjectFinished TargetStarted TargetFinished TaskStarted TaskFinished AnyEventRaised

Finally, a small red ball says the parent node breaks on first chance exceptions and the child node inherits from the parent The exception settings are stored on a per-solution basis What I like to do is set the Win32 Exceptions and C++ Exceptions nodes to Break Into The Debugger for both the When The Exception Is Thrown and If The Exception Is Not Handled options That way, whenever any native exception of any kind occurs, the process will stop and allow me to determine whether the exception is legitimate When you have either all exceptions or a single exception type set to stop, you'll see the dialog box in Figure 7-8, which shows a first chance C++ exception If you click the Break button, you'll be dropped to the first function on the stack that has source code, which is generally directly in your code where the exception occurred.

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