在项目中有时需要将整个业务逻辑类下面的方法封装成Web服务,由于只是简单的封装,在Web服务的后台代码中不会写上任何逻辑,这时我们就需要Web服务提供的方法与类下面提供的方法相同,这是就考虑到使用接口。申明一个接口,然后让业务逻辑类和Web服务类都实现该接口即可。这里我们就要用到VS中一个很好的功能:重构!
假设我们现在有一个业务逻辑类HelloLogic用于处理一些业务逻辑,如:
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点击“Refactor”菜单下的“Extract Interface”选项提取该类的接口,将出现如图窗口
选中所有的方法,点击OK即生成接口代码:
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由于需要在Web服务项目中使用该接口,这里需要将interface改成pulic的。然后在web服务项目中添加对该程序集的引用。新建HelloWebService页面,在后台代码上申明实现该接口:
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将光标放在IHelloLogic上,使用快捷键Shift+Alt+F10,将出现如图提示:
第一个是实现该接口,第二个是明确实现该接口,这里由于只有这个接口,而且就算有多个接口,只要接口中的函数不重复就可以直接使用第一个。选择第一个选项,系统将自动生成代码:
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接下来只需要将方法调用写到具体的函数里面就可以了。当然不能忘记了使用WebMethod特性。
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现在的代码已经可以编译通过了,但是有一个问题那就是在一般类方法中可以使用函数名重载,但是Web服务不能使用,我们这里对SayHello方法的重载需要进行修改。那么怎么实现Web服务下的函数重载拉?那就要用到MessageName属性对方法进行重命名了。使用MessageName 属性后还没有完,[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]这里的标注使得该Web服务不符合 WS-I Basic Profile v1.1,需要将属性值改为WsiClaims.None。最终完成的代码应该是:
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调用的时候我们将看到一个SayHello方法,一个SayHello1方法,这里的SayHello1方法就是对应的SayHello(string)方法了。
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好了,整个Web服务的调用就已经完成了,使用VS自带的重构功能来提取接口,实现接口有助于提供我们的开放效率,同时也降低了我们在封装成web服务的时候发生遗漏、拼写错误等失误。
由于本人对Web服务领域涉足未深,所以可能有错误之处,希望大家指正。
本文转自深蓝居博客园博客,原文链接:http://www.cnblogs.com/studyzy/archive/2008/03/18/1111253.html,如需转载请自行联系原作者