h。
2. 引入中间层，不断地抽象，是计算机行业中为了应对变化经常采用的一个法则。 这里就是将visit方法的重载，进一步抽象到了类层次，通过加入更多的类，解决更多的变化。
不过本文中的方法也有以下缺陷：
1. 我们知道visit方法还有一个缺陷在visit(Resource r)的方法实现中，为了操作Resource 对象，Resource对象不得不为之暴露更多的方法供外界访问。 现在这个问题变得更加严重， 不仅是Resource需要暴露方法，worker也需要暴露方法。
2. 示例中，我们没有考虑worker的实现代码。举个更好的例子，我们的worker很可能分别是SQLWorker- @Artech
thanks for you explanation. good to know. - 除此之外，这里举得安全的例子似乎不是一个合适的应用。不知道artech有没有考虑过更适合运用这一特性的场景？
- @Artech
先不考虑这是不是一个安全， 我的问题是client 如何通过wsdl得知他需要在header中加入特定的寻址信息。 - 我想知道这样的endpoint在wsdl中会如何表达需要用户传入特定header信息的需求。
这类安全需求似乎应该通过ws-policy表达，我有点好奇是不是应该通过别的方式，比如custom user token来实现这样的安全需求。 - Good Experience in architecture of 3 tier Win32 and .Net applications Experience in .Net 4.0 development Team player with high skills to assist/coach
- Good Experience in concepts of database access in 3 tier applications Experience in .Net 4.0 development Team player with high skills to assist/coach
- Good Experience in concepts of reporting engines Experience in integration of reporting engines in .Net applications Preferable with Stimulsoft Report
- Responsibilities • Development of flexible web application solutions. • Maintenance of the existing web application. • Analysis to provide the desi
- • Analyze business requirements and discuss with the Application Development Team the related tasks at database side. • Design the data model to supp
- 协变和逆变，这两个词的翻译实在很难表达出他们的真实含义。其实他们是继承和多态的衍生物，而且在.Net 1.0 和2.0中都提供了某种程度的支持，只是在.Net 4.0中支持的更加完善了。 简单说来，...
- How does ElementName Binding work? - Part 1 Logical Tree & NameScopeHow does ElementName Binding...
- Actually there are several questions in this post, though all of them are about DataContext inherita...
- In this part, I am going to introduce a new concept called InheritanceContext. In WPF, there are som...
- In part 1, I gave a general finding rule for ElementName binding, it works in most cases, however th...
- The existing documentation about the visual tree and logical tree in the Windows SDK leaves much to ...
- When using normal C# events, registering an event handler creates a strong reference from the event...
- It is proven that we software developers spend more time debugging than actually writing code. Gue...
- Most developers have used {Binding ElementName= myControl , Path = myProperty} in their WPF projects...
