动态调用WebService

原文参考：

https://www.cnblogs.com/shuajing/p/8694271.html

http://www.cnblogs.com/cyrix/articles/1834099.html

WebClient

public  class WebServiceHelper
    {
        #region 动态调用WebService动态调用地址
        /// < summary>           
        /// 动态调用web服务         
        /// </summary>          
        /// < param name="url">WSDL服务地址< /param> 
        /// < param name="methodname">方法名< /param>           
        /// < param name="args">参数< /param>           
        /// < returns>< /returns>          
        public static object InvokeWebService(string url, string methodname, object[] args,params Type[] types)
        {
            return WebServiceHelper.InvokeWebService(url, null, methodname, args, types);
        }
        /// <summary>
        /// 动态调用web服务
        /// </summary>
        /// <param name="url">WSDL服务地址</param>
        /// <param name="classname">服务接口类名</param>
        /// <param name="methodname">方法名</param>
        /// <param name="args">参数值</param>
        /// <returns></returns>
        public static object InvokeWebService(string url, string classname, string methodname, object[] args, params Type[] types)
        {

            string @namespace = "EnterpriseServerBase.WebService.DynamicWebCalling";
            if ((classname == null) || (classname == ""))
            {
                classname = WebServiceHelper.GetWsClassName(url);
            }
            try
            {

                //获取WSDL   
                WebClient wc = new WebClient();
                Stream stream = wc.OpenRead(url + "?WSDL");
                ServiceDescription sd = ServiceDescription.Read(stream);
                //注意classname一定要赋值获取 
                classname = sd.Services[0].Name;

                ServiceDescriptionImporter sdi = new ServiceDescriptionImporter();
                sdi.AddServiceDescription(sd, "", "");
                CodeNamespace cn = new CodeNamespace(@namespace);

                //生成客户端代理类代码          
                CodeCompileUnit ccu = new CodeCompileUnit();
                ccu.Namespaces.Add(cn);
                sdi.Import(cn, ccu);
                CSharpCodeProvider icc = new CSharpCodeProvider();


                //设定编译参数                 
                CompilerParameters cplist = new CompilerParameters();
                cplist.GenerateExecutable = false;
                cplist.GenerateInMemory = true;
                cplist.ReferencedAssemblies.Add("System.dll");
                cplist.ReferencedAssemblies.Add("System.XML.dll");
                cplist.ReferencedAssemblies.Add("System.Web.Services.dll");
                cplist.ReferencedAssemblies.Add("System.Data.dll");
                //编译代理类                 
                CompilerResults cr = icc.CompileAssemblyFromDom(cplist, ccu);
                if (true == cr.Errors.HasErrors)
                {
                    System.Text.StringBuilder sb = new System.Text.StringBuilder();
                    foreach (System.CodeDom.Compiler.CompilerError ce in cr.Errors)
                    {
                        sb.Append(ce.ToString());
                        sb.Append(System.Environment.NewLine);
                    }
                    throw new Exception(sb.ToString());
                }
                //生成代理实例，并调用方法                 
                System.Reflection.Assembly assembly = cr.CompiledAssembly;
                Type t = assembly.GetType(@namespace + "." + classname, true, true);
                object obj = Activator.CreateInstance(t);
                System.Reflection.MethodInfo mi = null;
                if (types.Length == 0)
                    mi = t.GetMethod(methodname);
                else
                    mi = t.GetMethod(methodname, types);
                return mi.Invoke(obj, args);

            }
            catch (Exception ex)
            {
                throw new Exception(ex.InnerException.Message, new Exception(ex.InnerException.StackTrace));
                // return "Error:WebService调用错误！" + ex.Message;
            }
        }
        private static string GetWsClassName(string wsUrl)
        {
            string[] parts = wsUrl.Split('/');
            string[] pps = parts[parts.Length - 1].Split('.');
            return pps[0];
        }
        #endregion
    }

object[] a = new object[3];
Type[] type = new Type[] { Type.GetType("System.Int32"), Type.GetType("System.Int32"), Type.GetType("System.Int32&") };
a[0] = (5);
a[1] = (6);
a[2] = 0;

 object result = WebServiceHelper.InvokeWebService("http://localhost:58271/WebService1.asmx", "Sum", a,type);

Soap

using System;
using System.Web;
using System.Xml;
using System.Collections;
using System.Net;
using System.Text;
using System.IO;
using System.Xml.Serialization;

//By huangz 2008-3-19

/**//// <summary>
///  利用WebRequest/WebResponse进行WebService调用的类,By 同济黄正 http://hz932.ys168.com 2008-3-19
/// </summary>
public class WebSvcCaller
{
    //<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 + "/" + 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)
    {
        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)
    {    //By 同济黄正 http://hz932.ys168.com 2008-3-19
        _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 + """);
        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());
        sr.Close();
        return doc.SelectSingleNode("//@targetNamespace").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.InnerXml  = ObjectToSoapXml(Pars[k]);
            soapMethod.AppendChild(soapPar);
        }
        soapBody.AppendChild(soapMethod);
        doc.DocumentElement.AppendChild(soapBody);
        return Encoding.UTF8.GetBytes(doc.OuterXml);
    }
    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();
        }
    }
    private static void SetWebRequest(HttpWebRequest request)
    {
        request.Credentials = CredentialCache.DefaultCredentials;
        request.Timeout = 10000;
    }

    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()));
        }
        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);
    }
}

public static string GetCustomerList()
        {
            string ServiceUrl = "";
            string InterfaceName = "regcustomerSearchInfo";

            Hashtable p = new Hashtable();
            p["account"] = "";
            p["password"] = "";
            p["conditions"] = new regcustomer_search_condition()
            {
                regcustomer_gas_code = "12345678",
                regcustomer_name = "",
                regcustomer_gas_address = "",
                regcustomer_mobile = "",
                regcustomer_telephone = ""
            };

            XmlDocument doc = WebSvcCaller.QuerySoapWebService(ServiceUrl, InterfaceName, p);
            return doc.InnerText;

        }

 

WebClient 方式适合传递基本类型参数，soap方式适合传递复杂类型参数。
注：soap请求，参数如果为自定义类，请求方要创建自定义类实体。