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There are basically two ways to serialize ADONET objects: using the object's own XML interface, and using NET Framework data formatters So far, we have reviewed the DataSet object's methods for serializing data to XML, and you've learned how to persist other objects like DataTable and DataView to XML Let's look now at what's needed to serialize ADONET objects using the standard NET Framework data formatters The big difference between methods like WriteXml and NET Framework data formatters is that in the former case, the object itself controls its own serialization process When NET Framework data formatters are involved, any object can behave in one of two ways The object can declare itself as serializable (using the Serializable attribute) and passively let the formatter extrapolate any significant information that needs to be serialized This type of object serialization uses .

NET Framework reflection to list all the properties that make up the state of an object The second behavior entails the object implementing the ISerializable interface, thus passing the formatters the data to be serialized After this step, however, the object no longer controls the process A class that neither is marked with the Serializable attribute nor implements the ISerializable interface can't be serialized No ADONET class declares itself as serializable, and only DataSet and DataTable implement the ISerializable interface For example, you can't serialize to any NET Framework formatters a DataColumn or a DataRow object Ordinary NET Framework Serialization The NET Framework comes with two predefined formatter objects defined in the SystemRuntimeSerializationFormatters namespace the binary formatter and the SOAP formatter The classes that provide these two serializers are BinaryFormatter and SoapFormatter The former is more efficient, is faster, and produces more compact code.

Note One of the criteria used in choosing many of the tools in this chapter was whether the tool provided

The latter is designed for interoperability and generates a SOAP-based description of the class that can be easily consumed on non-NET platforms Note A formatter object is merely a class that implements the IFormatter interface to support the serialization of a graph of objects The SoapFormatter and BinaryFormatter classes also implement the IRemotingFormatter interface to support remote procedure calls across AppDomains No technical reasons prevent you from implementing custom formatters In most cases, however, you only need to tweak the serialization process of a given class instead of creating an extension to the general serialization mechanism Quite often, this objective can be reached simply by implementing the ISerializable interface..

Those settings are the new default values for the controls. Note that if you redefine, say, the BackColor property in the markup of the .aspx file, that setting is ignored. The reason is that the theme settings are applied to controls immediately after instantiation. This means, for example, that each TextBox control is created with the background color you set in the .aspx markup, but one second later it receives the background color set in the skin.

The Mandatory transaction attribute cannot be used with EJB endpoints, because an EJB endpoint does not propagate a client transaction. This may change when web service transactions become standardized, but for now, using Mandatory with an EJB endpoint method is prohibited.

Common Debugging Question: Is there any way I can see the flow of operation in a managed application in the debugger Sometimes, the best way to learn how something fits together is to see in a hierarchical manner who is calling what. Although the Visual Studio .NET debugger doesn't offer any such options (without someone possibly writing an add-in), CORDBG.EXE, the debugger that comes with the .NET Framework, does. (For a solution to viewing the flow without a debugger, see 11.) If you want to experience all the joys of PC debugging circa 1985, CORDBG.EXE's console-based debugging is all for you. CORDBG.EXE has the wt command, which mimics WinDBG's Watch and Trace commands. In addition to showing the complete hierarchy of calls, wt also shows how many native instructions executed as a result of each method called. To best utilize the wt command, set a breakpoint on the first line of the method you want to start tracing from. The wt command will execute until it hits the return address of the starting scope. The following shows the output of the wt command for an application (WT.CS, available with this book's sample files) that calls three empty functions. As you can imagine, calling items in the .NET Framework class library will generate volumes of output. (cordbg) wt 1 3 3 5 3 3 3 App::Main App::Foo App::Bar App::Baz App::Bar App::Foo App::Main

In the middle pane, click Web Form, and then type a name for the web form. To use a separate code-behind file, select the Place Code In Separate File check box. You can opt to select the Select Master Page check box to select a page on which to base the look of your new web form. Master pages allow you to create a consistent look and feel for your entire website. We cover master pages in more detail in 2, Using Master Pages, Themes, and Caching. Click Add. If prompted, select a master page, and then click OK.