动态webService

using System;

using System.Net;

using System.IO;

using System.CodeDom;

using Microsoft.CSharp;

using System.CodeDom.Compiler;

using System.Web.Services.Description;

using System.Web.Services.Protocols;

namespace GlobalTechnologyInc.SnmpProject.CustomClass

{

    /* 调用方式

     *   string url = "http://www.webservicex.net/globalweather.asmx" ;

     *   string[] args = new string[2] ;

     *   args[0] = "Hangzhou";

     *   args[1] = "China" ;

     *   object result = WebServiceHelper.InvokeWebService(url ,"GetWeather" ,args) ;

     *   Response.Write(result.ToString());

     */

    public class WebServiceHelper

    {

        #region InvokeWebService

        /// <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)

        {

            return WebServiceHelper.InvokeWebService(url, null, methodname, args);

        }

        /// <summary>

        /// 动态调用web服务

        /// </summary>

        /// <param name="url">WSDL服务地址</param>

        /// <param name="classname">类名</param>

        /// <param name="methodname">方法名</param>

        /// <param name="args">参数</param>

        /// <returns></returns>

        public static object InvokeWebService(string url, string classname, string methodname, object[] args)

        {

            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);

                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 = t.GetMethod(methodname);

                return mi.Invoke(obj, args);

                /*

                PropertyInfo propertyInfo = type.GetProperty(propertyname);

                return propertyInfo.GetValue(obj, null);

                */

            }

            catch (Exception ex)

            {

                throw new Exception(ex.InnerException.Message, new Exception(ex.InnerException.StackTrace));

            }

        }

        private static string GetWsClassName(string wsUrl)

        {

            string[] parts = wsUrl.Split('/');

            string[] pps = parts[parts.Length - 1].Split('.');

            return pps[0];

        }

        #endregion

    }

}