C# 通過Get、Post、Soap調用WebService的方法

實現代碼來源于網絡，我只是作了一些修改！

using System;using System.Web;using System.xml;using System.Collections;using System.Net;using System.Text;using System.IO;using System.Xml.Serialization;/// <summary>///  利用WebRequest/WebResponse進行WebService調用的類/// </summary>public class WebServiceHelper{    //<webServices>    //  <PRotocols>    //    <add name="HttpGet"/>    //    <add name="HttpPost"/>    //  </protocols>    //</webServices>    private static Hashtable _xmlNamespaces = new Hashtable();//緩存xmlNamespace，避免重復調用GetNamespace    /// <summary>    /// 需要WebService支持Post調用    /// </summary>    public static XmlDocument QueryPostWebService(String URL, String MethodName, Hashtable Pars)    {        HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(URL + "/" + MethodName);        request.Method = "POST";        request.ContentType = "application/x-www-form-urlencoded";        SetWebRequest(request);        byte[] data = EncodePars(Pars);        WriteRequestData(request, data);        return ReadXmlResponse(request.GetResponse());    }    /// <summary>    /// 需要WebService支持Get調用    /// </summary>    public static XmlDocument QueryGetWebService(String URL, String MethodName, Hashtable Pars)    {        HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(URL + "/" + MethodName + "?" + ParsToString(Pars));        request.Method = "GET";        request.ContentType = "application/x-www-form-urlencoded";        SetWebRequest(request);        return ReadXmlResponse(request.GetResponse());    }    /// <summary>    /// 通用WebService調用(Soap),參數Pars為String類型的參數名、參數值    /// </summary>    public static XmlDocument QuerySoapWebService(String URL, String MethodName, Hashtable Pars)    {        if (_xmlNamespaces.ContainsKey(URL))        {            return QuerySoapWebService(URL, MethodName, Pars, _xmlNamespaces[URL].ToString());        }        else        {            return QuerySoapWebService(URL, MethodName, Pars, GetNamespace(URL));        }    }    /// <summary>    /// 通用WebService調用(Soap)    /// </summary>    /// <param name="URL"></param>    /// <param name="MethodName"></param>    /// <param name="Pars"></param>    /// <param name="XmlNs"></param>    /// <returns></returns>    private static XmlDocument QuerySoapWebService(String URL, String MethodName, Hashtable Pars, string XmlNs)    {        _xmlNamespaces[URL] = XmlNs;//加入緩存，提高效率        HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(URL);        request.Method = "POST";        request.ContentType = "text/xml; charset=utf-8";        request.Headers.Add("SOAPAction", "/"" + XmlNs + (XmlNs.EndsWith("/") ? "" : "/") + MethodName + "/"");        SetWebRequest(request);        byte[] data = EncodeParsToSoap(Pars, XmlNs, MethodName);        WriteRequestData(request, data);        XmlDocument doc = new XmlDocument(), doc2 = new XmlDocument();        doc = ReadXmlResponse(request.GetResponse());        XmlNamespaceManager mgr = new XmlNamespaceManager(doc.NameTable);        mgr.AddNamespace("soap", "http://schemas.xmlsoap.org/soap/envelope/");        String RetXml = doc.SelectSingleNode("http://soap:Body/*/*", mgr).InnerXml;        doc2.LoadXml("<root>" + RetXml + "</root>");        AddDelaration(doc2);        return doc2;    }    /// <summary>    /// 通過WebService的WSDL獲取XML名稱空間    /// </summary>    /// <param name="URL"></param>    /// <returns></returns>    private static string GetNamespace(String URL)    {        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(URL + "?WSDL");        SetWebRequest(request);        WebResponse response = request.GetResponse();        StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.UTF8);        XmlDocument doc = new XmlDocument();        doc.LoadXml(sr.ReadToEnd());        sr.Close();        return doc.SelectSingleNode("http://@targetNamespace").Value;    }    /// <summary>    /// 動態生成SOP請求報文內容    /// </summary>    /// <param name="Pars"></param>    /// <param name="XmlNs"></param>    /// <param name="MethodName"></param>    /// <returns></returns>    private static byte[] EncodeParsToSoap(Hashtable Pars, String XmlNs, String MethodName)    {        XmlDocument doc = new XmlDocument();        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>");        AddDelaration(doc);        XmlElement soapBody = doc.CreateElement("soap", "Body", "http://schemas.xmlsoap.org/soap/envelope/");        XmlElement soapMethod = doc.CreateElement(MethodName);        soapMethod.SetAttribute("xmlns", XmlNs);        foreach (string k in Pars.Keys)        {            XmlElement soapPar = doc.CreateElement(k);            soapPar.InnerXml = ObjectToSoapXml(Pars[k]);            soapMethod.AppendChild(soapPar);        }        soapBody.AppendChild(soapMethod);        doc.DocumentElement.AppendChild(soapBody);        return Encoding.UTF8.GetBytes(doc.OuterXml);    }    /// <summary>    /// 將對象轉換成XML節點格式    /// </summary>    /// <param name="o"></param>    /// <returns></returns>    private static string ObjectToSoapXml(object o)    {        XmlSerializer mySerializer = new XmlSerializer(o.GetType());        MemoryStream ms = new MemoryStream();        mySerializer.Serialize(ms, o);        XmlDocument doc = new XmlDocument();        doc.LoadXml(Encoding.UTF8.GetString(ms.ToArray()));        if (doc.DocumentElement != null)        {            return doc.DocumentElement.InnerXml;        }        else        {            return o.ToString();        }    }    /// <summary>    /// 設置WEB請求    /// </summary>    /// <param name="request"></param>    private static void SetWebRequest(HttpWebRequest request)    {        request.Credentials = CredentialCache.DefaultCredentials;        request.Timeout = 10000;    }    /// <summary>    /// 設置請求數據    /// </summary>    /// <param name="request"></param>    /// <param name="data"></param>    private static void WriteRequestData(HttpWebRequest request, byte[] data)    {        request.ContentLength = data.Length;        Stream writer = request.GetRequestStream();        writer.Write(data, 0, data.Length);        writer.Close();    }    /// <summary>    /// 獲取字符串的UTF8碼字符串    /// </summary>    /// <param name="Pars"></param>    /// <returns></returns>    private static byte[] EncodePars(Hashtable Pars)    {        return Encoding.UTF8.GetBytes(ParsToString(Pars));    }    /// <summary>    /// 將Hashtable轉換成WEB請求鍵值對字符串    /// </summary>    /// <param name="Pars"></param>    /// <returns></returns>    private static String ParsToString(Hashtable Pars)    {        StringBuilder sb = new StringBuilder();        foreach (string k in Pars.Keys)        {            if (sb.Length > 0)            {                sb.Append("&");            }            sb.Append(HttpUtility.UrlEncode(k) + "=" + HttpUtility.UrlEncode(Pars[k].ToString()));        }        return sb.ToString();    }    /// <summary>    /// 獲取Webservice響應報文XML    /// </summary>    /// <param name="response"></param>    /// <returns></returns>    private static XmlDocument ReadXmlResponse(WebResponse response)    {        StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.UTF8);        String retXml = sr.ReadToEnd();        sr.Close();        XmlDocument doc = new XmlDocument();        doc.LoadXml(retXml);        return doc;    }    /// <summary>    /// 設置XML文檔版本聲明    /// </summary>    /// <param name="doc"></param>    private static void AddDelaration(XmlDocument doc)    {        XmlDeclaration