using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Net;using System.IO;using System.CodeDom;using Microsoft.CSharp;using System.CodeDom.Compiler;using System.Reflection;namespace Dct.DuplexServices.Services{    internal class WebServiceHelper    {        /// 
        /// 根据指定的信息，调用远程WebService方法        /// 
        /// WebService的http形式的地址        /// 欲调用的WebService的命名空间        /// 欲调用的WebService的类名（不包括命名空间前缀）        /// 欲调用的WebService的方法名        /// 参数列表        /// 
     
      WebService的执行结果
             /// 
     
              /// 如果调用失败，将会抛出Exception。请调用的时候，适当截获异常。        /// 异常信息可能会发生在两个地方：        /// 1、动态构造WebService的时候，CompileAssembly失败。        /// 2、WebService本身执行失败。        /// 
             /// 
     
              /// 
              /// object obj = InvokeWebservice("http://localhost/test.asmx",        ///                               "dct",        ///                               "Common",        ///                               "GetToolType",        ///                               new object[]{"1"});        ///         /// 
             public static object InvokeWebservice(string url, string @namespace, string classname,                                              string methodname, object[] args)        {            try            {                WebClient wc = new WebClient();                Stream stream = wc.OpenRead(url + "?WSDL");                System.Web.Services.Description.ServiceDescription sd                    = System.Web.Services.Description.ServiceDescription.Read(stream);                System.Web.Services.Description.ServiceDescriptionImporter sdi                    = new System.Web.Services.Description.ServiceDescriptionImporter();                sdi.AddServiceDescription(sd, "", "");                CodeNamespace cn = new CodeNamespace(@namespace);                CodeCompileUnit ccu = new CodeCompileUnit();                ccu.Namespaces.Add(cn);                sdi.Import(cn, ccu);                CSharpCodeProvider csc = new CSharpCodeProvider();                ICodeCompiler icc = csc.CreateCompiler();                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");                CompilerResults cr = icc.CompileAssemblyFromDom(cplist, ccu);                if (true == cr.Errors.HasErrors)                {                    StringBuilder sb = new StringBuilder();                    foreach (CompilerError ce in cr.Errors)                    {                        sb.Append(ce.ToString());                        sb.Append(System.Environment.NewLine);                    }                    throw new Exception(sb.ToString());                }                Assembly assembly = cr.CompiledAssembly;                Type t = assembly.GetType(@namespace + "." + classname, true, true);                object obj = Activator.CreateInstance(t);                MethodInfo mi = t.GetMethod(methodname);                return mi.Invoke(obj, args);            }            catch (Exception ex)            {                throw new Exception(ex.InnerException.Message, new Exception(ex.InnerException.StackTrace));            }        }    }}