如何更改不影响客户的WCF服务合同？

我遇到了同样的问题，基本上是对方法的永久更改，这些更改会破坏客户端上的接口。

This is what I did: All of my 30+ functions (and the list grows and grows) took strings, ints and bytes() as data types as both input and output parameters, I created a master single endpoint and function that receives, as an input parameter, and sends back as the output, a single simple class. This class, called HostInterface, contains just two parameters, a string (which I use to encapsulate all my strings and ints) and a byte() array (into which I stuff all my binaries)

So, whether a client is calling something simple like Ping() with just one string param, or something complicated like ResumeDownload() with 5 strings, 2 ints and a byte array, all of those parameters get encapsulated in my HostInterface class, the strings and ints into the one String parameters (as XML) and the bytes into the byte field.

在主机端收到请求后，请按以下步骤进行：

  Function HostConnect(byval objInbound as HostInterface) as HostInterface

我解压缩objInbound中的字符串参数，将XML更改为对象，然后解压缩字节并将其添加到同一对象的字节部分。然后，我检查方法名称（ping或ResumeDownload）并进行相应处理。下图显示了基本思想-所有功能都通过单个函数进行操作，该函数采用并发送与参数相同的简单类。因此，我的界面无需更改。