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动态调用WebServices时出的有关问题,请帮助呀

热度:497   发布时间:2016-05-02 03:11:37
动态调用WebServices时出的问题,请帮助呀,在线等
C# code
using System;using System.Web;using System.Xml;using System.Collections;using System.Net;using System.Text;using System.IO;/// <summary>/// WebService 的摘要说明/// </summary>public class WebService{    public WebService()    {         //<webServices>    //  <protocols>    //    <add name="HttpGet"/>    //    <add name="HttpPost"/>    //  </protocols>    //</webServices>    }    private static Hashtable _xmlNamespaces = new Hashtable();//缓存xmlNamespace,避免重复调用GetNamespace    /**/    /// <summary>    /// 需要WebService支持Post调用    /// </summary>    public static XmlDocument QueryPostWebService(String URL, String MethodName, Hashtable Pars)    {        HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(URL );        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调用    /// </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调用(Soap),参数Pars为String类型的参数名、参数值    /// </summary>    public static XmlDocument QuerySoapWebService(String URL, String MethodName, Hashtable Pars)    {        //By 同济黄正 http://hz932.ys168.com 2008-3-19        if (_xmlNamespaces.ContainsKey(URL))        {            return QuerySoapWebService(URL, MethodName, Pars, _xmlNamespaces[URL].ToString());        }        else        {            return QuerySoapWebService(URL, MethodName, Pars, GetNamespace(URL));        }    }    private static XmlDocument QuerySoapWebService(String URL, String MethodName, Hashtable Pars, string XmlNs)    {        _xmlNamespaces[URL] = XmlNs;//加入缓存,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 + "");        request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; .NET CLR 1.0.3705;)";//LSH 2011-01-10        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("//soap:Body/*", mgr).InnerXml;        doc2.LoadXml("<root>" + RetXml + "</root>");        AddDelaration(doc2);        return doc2;    }    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());        return doc.SelectSingleNode("[email protected]").Value;    }    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.InnerText = Pars[k].ToString();            soapMethod.AppendChild(soapPar);        }        soapBody.AppendChild(soapMethod);        doc.DocumentElement.AppendChild(soapBody);        return Encoding.UTF8.GetBytes(doc.OuterXml);    }    private static void SetWebRequest(HttpWebRequest request)    {        request.Credentials = CredentialCache.DefaultCredentials;        request.Timeout = 1000000;    }    private static void WriteRequestData(HttpWebRequest request, byte[] data)    {        request.ContentLength = data.Length;        Stream writer = request.GetRequestStream();        writer.Write(data, 0, data.Length);        writer.Close();    }    private static byte[] EncodePars(Hashtable Pars)    {        return Encoding.UTF8.GetBytes(ParsToString(Pars));    }    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()));            sb.Append(Pars[k].ToString());        }        return sb.ToString();    }    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;    }    private static void AddDelaration(XmlDocument doc)    {        XmlDeclaration decl = doc.CreateXmlDeclaration("1.0", "utf-8", null);        doc.InsertBefore(decl, doc.DocumentElement);    }    }
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