C#调用WebService（Soap）接口方法

首先了解两点知识：

1.什么是WebService

2.什么是soap

WebService：是一个SOA（面向服务的编程）的架构，它是不依赖于语言，不依赖于平台，可以实现不同的语言间的相互调用，通过Internet进行基于Http协议的网络应用间的交互。

WebService实现不同语言间的调用，是依托于一个标准，webservice是需要遵守WSDL（web服务定义语言）/SOAP（简单请求协议）规范的。 WebService=WSDL+SOAP+UDDI（webservice的注册）。

WebServices 提供一个建立分布式应用的平台。

Soap ：是基于 XML 的简易协议，可使应用程序在 HTTP 之上进行信息交换。或者更简单地说：SOAP 是用于访问网络服务的协议，基于 XML。SOAP 是一种用于发送消息的格式。

Soap协议的Post方法

        /// <summary>
        /// Soap协议Post方法
        /// </summary>
        /// <param name="uri">WebService地址</param>
        /// <param name="str">传入Soap协议格式数据</param>
        /// <returns></returns>
        public static string SendToReturn(Uri _uri, StringBuilder _str)
        {
            string _returnstr = "";
            //发起请求
            WebRequest webRequest = WebRequest.Create(_uri);
            webRequest.ContentType = "text/xml; charset=utf-8";
            webRequest.Method = "POST";
            using (Stream requestStream = webRequest.GetRequestStream())
            {
                byte[] paramBytes = Encoding.UTF8.GetBytes(_str.ToString());
                requestStream.Write(paramBytes, 0, paramBytes.Length);
            }
            //响应
            try
            {
                WebResponse webResponse = webRequest.GetResponse();
                using (StreamReader myStreamReader = new StreamReader(webResponse.GetResponseStream(), Encoding.UTF8))
                {
                    _returnstr = myStreamReader.ReadToEnd();
                }
            }
            catch (WebException ex)
            {
                _returnstr = new StreamReader(ex.Response.GetResponseStream()).ReadToEnd();
            }
            return _returnstr;
        }

Soap协议的Xml格式组装（根据每个人情况自行组装）

  StringBuilder soap = new StringBuilder();
  soap.Append("<?xml version=\"1.0\" encoding=\"utf-8\"?>");
  soap.Append("<soapenv:Envelope xmlns:soapenv=\"http://schemas.xmlsoap.org/soap/envelope/\"  xmlns:soap=\"http://www.shaphar.com/SoapService\" >");
  soap.Append("<soapenv:Header/>");
  soap.Append("<soapenv:Body>");
  soap.Append("<soap:REQUEST_DATA>");
  soap.Append("<soap:commonHeader>");
  soap.AppendFormat("<soap:BIZTRANSACTIONID>InsertOUTPT_CARRIER_TRACKING_PS_{0}</soap:BIZTRANSACTIONID><soap:COUNT>{1}</soap:COUNT><soap:CONSUMER>{2}</soap:CONSUMER>", DateTime.Now.ToString("yyyyMMddHHmmss"), 1, "SYGD");
  soap.AppendFormat("<soap:SRVLEVEL>1</soap:SRVLEVEL><soap:ACCOUNT></soap:ACCOUNT> <soap:PASSWORD></soap:PASSWORD><soap:COMMENTS></soap:COMMENTS>");
  soap.Append("</soap:commonHeader>");
  soap.Append("<soap:LIST><![CDATA[<DATA>");
  soap.Append("<ITEM>");
  soap.AppendFormat("<BL_LOAD_NO>{0}</BL_LOAD_NO>", soapBill.BL_LOAD_NO == null ? "" : soapBill.BL_LOAD_NO);
  soap.AppendFormat("<BL_ORDER_NO>{0}</BL_ORDER_NO>", soapBill.BL_ORDER_NO == null ? "" : soapBill.BL_ORDER_NO);
  soap.AppendFormat("<CUSTOMER_ORDER_NO>{0}</CUSTOMER_ORDER_NO>", soapBill.CUSTOMER_ORDER_NO == null ? "" : soapBill.CUSTOMER_ORDER_NO);
  soap.AppendFormat("<STATUS>{0}</STATUS>", soapBill.STATUS == null ? "" : soapBill.STATUS);
  soap.AppendFormat("<TRACKING_TIME>{0}</TRACKING_TIME>", soapBill.TRACKING_TIME == null ? "" : soapBill.TRACKING_TIME);
  soap.AppendFormat("<STATUS_TIME>{0}</STATUS_TIME>", soapBill.STATUS_TIME == null ? "" : soapBill.STATUS_TIME);
  soap.AppendFormat("<POSITION>{0}</POSITION>", soapBill.POSITION == null ? "" : soapBill.POSITION);
  soap.AppendFormat("<VEHICLE_ID>{0}</VEHICLE_ID>", soapBill.VEHICLE_ID == null ? "" : soapBill.VEHICLE_ID);
  soap.AppendFormat("<DRIVER_NAME>{0}</DRIVER_NAME>", soapBill.DRIVER_NAME == null ? "" : soapBill.DRIVER_NAME);
  soap.AppendFormat("<SIGNER>{0}</SIGNER>", soapBill.SIGNER == null ? "" : soapBill.SIGNER);
  soap.AppendFormat("<VEHICLE_TYPE>{0}</VEHICLE_TYPE>", soapBill.VEHICLE_TYPE == null ? "" : soapBill.VEHICLE_TYPE);
  soap.AppendFormat("<NODE_DESCRIPTION>{0}</NODE_DESCRIPTION>", soapBill.NODE_DESCRIPTION == null ? "" : soapBill.NODE_DESCRIPTION);
  soap.AppendFormat("<NOTES>{0}</NOTES>", soapBill.NOTES == null ? "" : soapBill.NOTES);
  soap.AppendFormat("<QTY_EACH>{0}</QTY_EACH>", soapBill.QTY_EACH == null ? "" : soapBill.QTY_EACH);
  soap.AppendFormat("<GROSSWEIGHT>{0}</GROSSWEIGHT>", soapBill.GROSSWEIGHT == null ? "" : soapBill.GROSSWEIGHT);
  soap.AppendFormat("<CUBIC>{0}</CUBIC>", soapBill.CUBIC == null ? "" : soapBill.CUBIC);
  soap.AppendFormat("<UDF01>{0}</UDF01>", soapBill.UDF01 == null ? "" : soapBill.UDF01);
  soap.AppendFormat("<UDF02>{0}</UDF02>", soapBill.UDF02 == null ? "" : soapBill.UDF02);
  soap.AppendFormat("<UDF03>{0}</UDF03>", soapBill.UDF03 == null ? "" : soapBill.UDF03);
  soap.AppendFormat("<UDF04>{0}</UDF04>", soapBill.UDF04 == null ? "" : soapBill.UDF04);
  soap.AppendFormat("<UDF05>{0}</UDF05>", soapBill.UDF05 == null ? "" : soapBill.UDF05);
  soap.Append("</ITEM>");
  soap.Append("</DATA>]]></soap:LIST>");
  soap.Append("</soap:REQUEST_DATA>");
  soap.Append("</soapenv:Body>");
  soap.Append("</soapenv:Envelope>");

Soap协议的Post方法调用

 //插入请求数据的日志
 AddInterfaceLog("SendNodeReturnData", "请求数据：" + soap.ToString(), 1);
 //调用webService接口(soap)
 Uri uri = new Uri(reqUrl);
 string soapResult = SendToReturn(uri, soap);
 //插入响应结果的日志
 AddInterfaceLog("SendNodeReturnData", "响应结果：" + soapResult, 1);

调用后结果

 

PS：

具体参考以下两篇博客：

https://www.jb51.net/article/130404.htm   

https://blog.csdn.net/sinat_29009169/article/details/103917166