C#动态调用WebService

　　 public class WSHelper
    {
        /// < 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 WSHelper.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, params object[] args)
        {
            string @namespace = "Model";//"EnterpriseServerBase.WebService.DynamicWebCalling";
            if ((classname == null) || (classname == ""))
            {
                classname = WSHelper.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();//创建客户端代理代理类。
                sdi.AddServiceDescription(sd, "", "");
                CodeNamespace cn = new CodeNamespace(@namespace);//这里随便指定一个命名空间，但要与后面的一致  
                //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);
            }
            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];
        }
        public static byte[] SerializeObject(object pObj)
        {
            if (pObj == null)
                return null;
            System.IO.MemoryStream memoryStream = new System.IO.MemoryStream();
            BinaryFormatter formatter = new BinaryFormatter();
            formatter.Serialize(memoryStream, pObj);
            memoryStream.Position = 0;
            byte[] read = new byte[memoryStream.Length];
            memoryStream.Read(read, 0, read.Length);
            memoryStream.Close();
            return read;
        }
        public static object InvokeWebMethod(string _url, string _methodName, params object[] _params)
        {
            string @namespace = "proService";
            string classname = WSHelper.GetWsClassName(_url);
            WebClient client = new WebClient();
            Stream stream = client.OpenRead(_url + "?WSDL");
            ServiceDescription description = ServiceDescription.Read(stream);
            ServiceDescriptionImporter importer = new ServiceDescriptionImporter();//创建客户端代理代理类。
            importer.ProtocolName = "Soap"; //指定访问协议。
            importer.Style = ServiceDescriptionImportStyle.Client; //生成客户端代理。
            importer.CodeGenerationOptions = CodeGenerationOptions.GenerateProperties |
                CodeGenerationOptions.GenerateNewAsync;
            importer.AddServiceDescription(description, null, null); //添加WSDL文档。
            CodeNamespace nmspace = new CodeNamespace(@namespace); //命名空间 这个命名空间可以自己取
            CodeCompileUnit unit = new CodeCompileUnit();
            unit.Namespaces.Add(nmspace);
            ServiceDescriptionImportWarnings warning = importer.Import(nmspace, unit);
            CodeDomProvider provider = CodeDomProvider.CreateProvider("CSharp");
            CompilerParameters parameter = new CompilerParameters();
            parameter.GenerateExecutable = false;
            parameter.GenerateInMemory = true;
            //parameter.OutputAssembly = "Model.dll";//输出程序集的名称
            parameter.ReferencedAssemblies.Add("System.dll");
            parameter.ReferencedAssemblies.Add("System.XML.dll");
            parameter.ReferencedAssemblies.Add("System.Web.Services.dll");
            parameter.ReferencedAssemblies.Add("System.Data.dll");
            parameter.ReferencedAssemblies.Add("Model.dll");
            CompilerResults result = provider.CompileAssemblyFromDom(parameter, unit);
            if (result.Errors.HasErrors)
            {
                // 显示编译错误信息             
            }
            System.Reflection.Assembly assembly = result.CompiledAssembly;
            //Assembly asm = Assembly.LoadFrom("Model.dll");//加载前面生成的程序集
            //Type t = asm.GetType("Test.AddTermService"); //前面的命名空间.类名,类必须是webservice中定义的
            Type t = assembly.GetType(@namespace + "." + classname, true, true);
            object o = Activator.CreateInstance(t);
            MethodInfo method = t.GetMethod(_methodName);//GetPersons是服务端的方法名称,你想调用服务端的什么方法都可以在这里改,最好封装一下
            object item = method.Invoke(o, _params); //注：method.Invoke(o, null)返回的是一个Object,如果你服务端返回的是DataSet,这里也是用(DataSet)method.Invoke(o, null)转一下就行了
            //foreach (string str in item)
            //    Console.WriteLine(str);               //上面是根据WebService地址，模似生成一个代理类,如果你想看看生成的代码文件是什么样子，可以用以下代码保存下来，默认是保存在bin目录下面
            //TextWriter writer = File.CreateText("MyTest.cs");
            //provider.GenerateCodeFromCompileUnit(unit, writer, null);
            //writer.Flush();
            //writer.Close();
            return item;
        }
    }