C#动态调用webservice

最近项目需要调用对方java写的webservice接口

调用示例：

      //接收结果            XmlNode xmlNode1;string strSenddata = "";//这个是要发送的报文数据Hashtable ht = new Hashtable();ht.Add("xmlIn", strSenddata);xmlNode1 = PrintFaPiao.WebServiceCaller.QuerySoapWebService("http://testservicebus.sinosig.com/servicemgr/services/outputOtherSubject", "outputOtherSubject", ht);//接口地址，方法名，发送报文

WebServiceCaller类：

  1 using System;
  2 using System.Collections;
  3 using System.IO;
  4 using System.Net;
  5 using System.Text;
  6 using System.Xml;
  7 using System.Xml.Serialization;
  8 namespace PrintFaPiao
  9 {
 10     /// <summary>
 11     /// 利用WebRequest/WebResponse进行WebService调用的类
 12     /// </summary>
 13     public class WebServiceCaller
 14     {
 15         #region Tip:使用说明
 16         //webServices 应该支持Get和Post调用，在web.config应该增加以下代码
 17         //<webServices>
 18         // <protocols>
 19         //  <add name="HttpGet"/>
 20         //  <add name="HttpPost"/>
 21         // </protocols>
 22         //</webServices>
 23
 24         //调用示例：
 25         //Hashtable ht = new Hashtable(); //Hashtable 为webservice所需要的参数集
 26         //ht.Add("str", "test");
 27         //ht.Add("b", "true");
 28         //XmlDocument xx = WebSvcCaller.QuerySoapWebService("http://localhost:81/service.asmx", "HelloWorld", ht);
 29         //MessageBox.Show(xx.OuterXml);
 30         #endregion
 31
 32         /// <summary>
 33         /// 需要WebService支持Post调用
 34         /// </summary>
 35         public static XmlDocument QueryPostWebService(String URL, String MethodName, Hashtable Pars)
 36         {
 37             HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(URL + "/" + MethodName);
 38             request.Method = "POST";
 39             request.ContentType = "application/x-www-form-urlencoded";
 40             SetWebRequest(request);
 41             byte[] data = EncodePars(Pars);
 42             WriteRequestData(request, data);
 43             return ReadXmlResponse(request.GetResponse());
 44         }
 45
 46         /// <summary>
 47         /// 需要WebService支持Get调用
 48         /// </summary>
 49         public static XmlDocument QueryGetWebService(String URL, String MethodName, Hashtable Pars)
 50         {
 51             HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(URL + "/" + MethodName + "?" + ParsToString(Pars));
 52             request.Method = "GET";
 53             request.ContentType = "application/x-www-form-urlencoded";
 54             SetWebRequest(request);
 55             return ReadXmlResponse(request.GetResponse());
 56         }
 57
 58         /// <summary>
 59         /// 通用WebService调用(Soap),参数Pars为String类型的参数名、参数值
 60         /// </summary>
 61         public static XmlDocument QuerySoapWebService(String URL, String MethodName, Hashtable Pars)
 62         {
 63             if (_xmlNamespaces.ContainsKey(URL))
 64             {
 65                 return QuerySoapWebService(URL, MethodName, Pars, _xmlNamespaces[URL].ToString());
 66             }
 67             else
 68             {
 69                 return QuerySoapWebService(URL, MethodName, Pars, GetNamespace(URL));
 70             }
 71         }
 72
 73         private static XmlDocument QuerySoapWebService(String URL, String MethodName, Hashtable Pars, string XmlNs)
 74         {
 75             _xmlNamespaces[URL] = XmlNs;//加入缓存，提高效率
 76             HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(URL);
 77             request.Method = "POST";
 78             request.ContentType = "text/xml; charset=UTF-8";
 79             request.Headers.Add("SOAPAction", "\"" + XmlNs + (XmlNs.EndsWith("/") ? "" : "/") + MethodName + "\"");
 80             SetWebRequest(request);
 81             byte[] data = EncodeParsToSoap(Pars, XmlNs, MethodName);
 82             WriteRequestData(request, data);
 83             XmlDocument doc = new XmlDocument(), doc2 = new XmlDocument();
 84             doc = ReadXmlResponse(request.GetResponse());
 85
 86             XmlNamespaceManager mgr = new XmlNamespaceManager(doc.NameTable);
 87             mgr.AddNamespace("soap", "http://schemas.xmlsoap.org/soap/envelope/");
 88             String RetXml = doc.SelectSingleNode("//soap:Body/*/*", mgr).InnerXml;
 89             doc2.LoadXml("<root>" + RetXml + "</root>");
 90             AddDelaration(doc2);
 91             return doc2;
 92         }
 93         private static string GetNamespace(String URL)
 94         {
 95             HttpWebRequest request = (HttpWebRequest)WebRequest.Create(URL + "?WSDL");
 96             SetWebRequest(request);
 97             WebResponse response = request.GetResponse();
 98             StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.Default);
 99             XmlDocument doc = new XmlDocument();
100             string test = sr.ReadToEnd();
101
102
103             doc.LoadXml(test);
104             sr.Close();
105             return doc.SelectSingleNode("//@targetNamespace").Value;
106         }
107
108         private static byte[] EncodeParsToSoap(Hashtable Pars, String XmlNs, String MethodName)
109         {
110             XmlDocument doc = new XmlDocument();
111             doc.LoadXml("<soap:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\"></soap:Envelope>");
112             AddDelaration(doc);
113             //XmlElement soapBody = doc.createElement_x_x("soap", "Body", "http://schemas.xmlsoap.org/soap/envelope/");
114             XmlElement soapBody = doc.CreateElement("soap", "Body", "http://schemas.xmlsoap.org/soap/envelope/");
115             //XmlElement soapMethod = doc.createElement_x_x(MethodName);
116             XmlElement soapMethod = doc.CreateElement(MethodName);
117             soapMethod.SetAttribute("xmlns", XmlNs);
118             foreach (string k in Pars.Keys)
119             {
120                 //XmlElement soapPar = doc.createElement_x_x(k);
121                 XmlElement soapPar = doc.CreateElement(k);
122                 soapPar.InnerXml = ObjectToSoapXml(Pars[k]);
123                 soapMethod.AppendChild(soapPar);
124             }
125             soapBody.AppendChild(soapMethod);
126             doc.DocumentElement.AppendChild(soapBody);
127             return Encoding.UTF8.GetBytes(doc.OuterXml);
128         }
129         private static string ObjectToSoapXml(object o)
130         {
131             XmlSerializer mySerializer = new XmlSerializer(o.GetType());
132             MemoryStream ms = new MemoryStream();
133             mySerializer.Serialize(ms, o);
134             XmlDocument doc = new XmlDocument();
135             doc.LoadXml(Encoding.UTF8.GetString(ms.ToArray()));
136             if (doc.DocumentElement != null)
137             {
138                 return doc.DocumentElement.InnerXml;
139             }
140             else
141             {
142                 return o.ToString();
143             }
144         }
145
146         /// <summary>
147         /// 设置凭证与超时时间
148         /// </summary>
149         /// <param name="request"></param>
150         private static void SetWebRequest(HttpWebRequest request)
151         {
152             request.Credentials = CredentialCache.DefaultCredentials;
153             request.Timeout = 10000;
154         }
155
156         private static void WriteRequestData(HttpWebRequest request, byte[] data)
157         {
158             request.ContentLength = data.Length;
159             Stream writer = request.GetRequestStream();
160             writer.Write(data, 0, data.Length);
161             writer.Close();
162         }
163
164         private static byte[] EncodePars(Hashtable Pars)
165         {
166             return Encoding.UTF8.GetBytes(ParsToString(Pars));
167         }
168
169         private static String ParsToString(Hashtable Pars)
170         {
171             StringBuilder sb = new StringBuilder();
172             foreach (string k in Pars.Keys)
173             {
174                 if (sb.Length > 0)
175                 {
176                     sb.Append("&");
177                 }
178                 //sb.Append(HttpUtility.UrlEncode(k) + "=" + HttpUtility.UrlEncode(Pars[k].ToString()));
179             }
180             return sb.ToString();
181         }
182
183         private static XmlDocument ReadXmlResponse(WebResponse response)
184         {
185             StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
186             String retXml = sr.ReadToEnd();
187             sr.Close();
188             XmlDocument doc = new XmlDocument();
189             doc.LoadXml(retXml);
190             return doc;
191         }
192
193         private static void AddDelaration(XmlDocument doc)
194         {
195             XmlDeclaration decl = doc.CreateXmlDeclaration("1.0", "utf-8", null);
196             doc.InsertBefore(decl, doc.DocumentElement);
197         }
198
199         private static Hashtable _xmlNamespaces = new Hashtable();//缓存xmlNamespace，避免重复调用GetNamespace
200     }
201 }

View Code

如果遇到xml转换错误，可能是编码问题，更改下请求的编码格式或者更改下接收的编码格式（上面例子中开始用utf-8接收结果转换xml的时候提示缺少根元素，于是改成默认编码后编译成功）

代码引用：https://www.cnblogs.com/zpx1986/p/5584370.html

转载于:https://www.cnblogs.com/xuxiaoshuan/p/10026526.html

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