WebService可以完全不需处理的返回一个dataset,却不能返回一个字符串数组?

Question

服务端:
        [WebMethod]
        public string[] mthRSAKeyGet()
        {
            string strRSAPrivateKey="", strRSAPublicKey="";
            string[] astrRSAKey = new string[] {strRSAPublicKey, strRSAPrivateKey };
            return astrRSAKey;
        }

        在客户端用以下代码调用出错:
            BAService.User.LoginSoapClient seeLogin = new BAService.User.LoginSoapClient("LoginSoap", ProjectClassLibrary.CommonClass.Source + "User/Login.asmx");
            string[] astrRSAKey = seeLogin.mthRSAKeyGet();

出错信息:无法将类型“BA.BAService.User.ArrayOfString”隐式转换为“string[]”

我知道可以用seeLogin.mthRSAKeyGet().ToArray()即可解决问题,我只是很好奇为什么我明明标定的返回值是字符串数组,返回结果变成ArrayOfString(List<string>)了?

而datatable和byte[]等却可以不需任何转换直接返回,这是为何?或者说Web Services这样设计基于何种考虑?另外除了ToArray方式是否还有其它方式让WebMethod直接返回字符串数组?

以上是使用vs2010添加默认的服务引用时才会导致,如果在添加服务引用时点击高级选择web引用生成的代理返回的是string[],这是为何?为什么2.0的web引用可以直接返回string[],而3.5的服务引用只能返回List[string]?

Answer 1

应该是你生成的LoginSoapClient 里的契约定义有问题

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http://feiyun0112.cnblogs.com/

Answer 2

您好,我是用vs2010添加服务引用自动生成的代理

Answer 3

而且我返回byte数组等都不会出问题

Answer 4

Hi,

According research, if you want to get the string[] in the client in one of two ways suggested in this post:

• a) by creating a WCF service instead of an ASMX service, and using Add Service Reference.
• b) by keeping the asmx service, and using Add Web Reference instead of Add Service Reference.

Best Regards.

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Answer 5

用 ArrayOfString [] 代替 string [] 接收反馈结果。