POST방식 XML 형식 [OperationContract] [WebInvoke(UriTemplate = "API주소", Method = "POST", BodyStyle = WebMessageBodyStyle.WrappedRequest, RequestFormat = WebMessageFormat.Xml, ResponseFormat = WebMessageFormat.Xml)] System.Data.DataSet API호출함수명(); GET방식 JSON [OperationContract] [WebInvoke(UriTemplate = "API주소", Method = "GET", BodyStyle = WebMessageBodyStyle.WrappedRequest, RequestFormat = WebMessage..