每个方法需要加SoapRpcMethod， Action不能一样，这里的域名用*代替了，如下面两个方法：
[WebMethod]
[SoapRpcMethod(Use=SoapBindingUse.Literal,Action= "http://****.***/GetData", RequestNamespace = "http://****.***/", ResponseNamespace = "http://****.***/")]public string GetData(Object request)
{}
[WebMethod]
[SoapRpcMethod(Use=SoapBindingUse.Literal,Action= "http://****.***/WriteData", RequestNamespace = "http://****.***/", ResponseNamespace = "http://****.***/")]
public string WriteData(Object request)
{}