动态调用webservice及WCF服务

动态调用web服务,该方法只针对Web service， WCF的服务不行，如果是WCF的就通过工具直接生产代理类，把代理类配置到调用的项目中，通过配置客户端的终结点动态的取实现：

通过Svcutil.exe 工具生成代理类调用

            1.找到如下地址“C:WindowsSystem32cmd.exe”  命令行工具，右键以管理员身份运行（视系统是否为win7 而定） 

            2.输入如下命令："C:Program FilesMicrosoft SDKsWindowsv7.0AinSvcUtil.exe" /out:C:WCFClintClientCode.cs /config:C:WCFClintapp.config 　　　　http://localhost:81/WCFServiceTest/CNPatentSearchService.svc

              说明：

              参数1：  “C:Program FilesMicrosoft SDKsWindowsv7.0AinSvcUtil.exe”   ，是指 SvcUtil.exe 工具的地址

              参数2：  “C:WCFClintClientCode.cs ”   ，是指生成的代理类输出存放到的地址

              参数3：  “C:WCFClintapp.config ”   ，是指存放到调用WCF服务程序目录下的配置文件的输出存放地址

              参数4：  “http://localhost:81/WCFServiceTest/CNPatentSearchService.svc”   ，是指部署到IIS 的WCF服务的地址

             

/// <summary>
    /// 动态调用webservice
    /// </summary>
    public static class WebServiceHelper
    {
        public static object InvokeWebService(string url, string methodname, params object[] args)
        {
            return InvokeWebService(url, null, methodname, args);
        }

        public static object InvokeWebService(string url, string classname, string methodname, params object[] args)
        {
            string @namespace = "ServiceBase.WebService.DynamicWebLoad";
            if (string.IsNullOrEmpty(classname))
            {
                classname = WebServiceHelper.GetClassName(url);
            }

            //获取服务描述语言(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);

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

            //CodeDomProvider provider = CodeDomProvider.CreateProvider("C#");
            CodeDomProvider provider = new CSharpCodeProvider();

            //设定编译器的参数
            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 = provider.CompileAssemblyFromDom(cplist, ccu);
            if (true == cr.Errors.HasErrors)
            {
                System.Text.StringBuilder sb = new StringBuilder();
                foreach (CompilerError ce in cr.Errors)
                {
                    sb.Append(ce.ToString() + System.Environment.NewLine);
                }
                throw new Exception(sb.ToString());
            }

            // 生成代理实例并调用方法
            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);
        }

        private static string GetClassName(string url)
        {
            string[] parts = url.Split('/');
            string[] pps = parts[parts.Length - 1].Split('.');
            return pps[0];
        }
    }