C# 动态调取 soap 接口

调用示例

　　string url = "http://localhost:8080/server/PatientService.asmx";    Hashtable ht = new Hashtable();    ht.Add("start_time", starttime); XmlDocument xx = WebServiceCaller.QueryGetWebService(url, soapmethod, ht);

实现方法类

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