动态调用WebService的方法

/// <summary>
    /// 动态调用WebService
    /// </summary>
    /// <param name="url">WebService地址</param>
    /// <param name="classname">类名</param>
    /// <param name="methodname">方法名(模块名)</param>
    /// <param name="args">参数列表</param>
    /// <returns>object</returns>
    public static object InvokeWebService(string url,string classname,string methodname,object[] args)
    {
        string @namespace = "service.test";      
        //获取服务描述语言(WSDL)
        WebClient wc = new WebClient();
        Stream stream = wc.OpenRead(url + "?WSDL");//【1】
        ServiceDescription sd = ServiceDescription.Read(stream);//【2】
        ServiceDescriptionImporter sdi = new ServiceDescriptionImporter();//【3】
        sdi.AddServiceDescription(sd,"","");
        CodeNamespace cn = new CodeNamespace(@namespace);//【4】
        //生成客户端代理类代码
        CodeCompileUnit ccu = new CodeCompileUnit();//【5】
        ccu.Namespaces.Add(cn);
        sdi.Import(cn,ccu);
        CSharpCodeProvider csc = new CSharpCodeProvider();//【6】
        ICodeCompiler icc = csc.CreateCompiler();//【7】
        //设定编译器的参数
        CompilerParameters cplist = new CompilerParameters();//【8】
        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);//【9】
        if (true == cr.Errors.HasErrors)
        {
            System.Text.StringBuilder sb = new StringBuilder();
            foreach (CompilerError ce in cr.Errors)
            {
                sb.Append(ce.ToString());
                sb.Append(System.Environment.NewLine);
            }
            throw new System.Exception(sb.ToString());
        }

        //生成代理实例,并调用方法
        System.Reflection.Assembly assembly = cr.CompiledAssembly;
        System.Type t = assembly.GetType(@namespace + "." + classname,true,true);
        object obj = System.Activator.CreateInstance(t);//【10】
        System.Reflection.MethodInfo mi = t.GetMethod(methodname);//【11】
        return mi.Invoke(obj,args);
    }