动态调用 WebService

/// <summary>
    /// 动态调用 WebService的代理类
    /// </summary>
    class WebServiceHelper
    {
        /// <summary>
        /// 动态调用web服务
        /// </summary>
        /// <param name="url">web服务的地址</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);
        }
        public static object InvokeWebService(string url, string classname, object[] args)
        {
            if ((classname == null) || (classname == "")) 
            {
                classname = WebServiceHelper.GetWsClassName(url);
            }
            try
            {   // 1. 使用 WebClient 下载 WSDL 信息
                WebClient wc = new WebClient();    
                Stream stream = wc.OpenRead(url + "?WSDL");
                // 2. 创建和格式化 WSDL 文档。
                ServiceDescription description = ServiceDescription.Read(stream);
                ServiceDescriptionImporter sdi = new ServiceDescriptionImporter();
                sdi.AddServiceDescription(description, "", "");
                CodeNamespace cn = new CodeNamespace();// 为代理类添加命名空间，缺省为全局空间

                //3.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();

                //4.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");

                //5.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());
                }

                //6.生成代理实例，使用 Reflection并调用方法   
                System.Reflection.Assembly assembly = cr.CompiledAssembly;        
                Type t = assembly.GetType(classname,true,true);    
                object obj = Activator.CreateInstance(t);               
                System.Reflection.MethodInfo method = t.getmethod(methodname);
                return method.Invoke(obj, args);   

            }
            catch (Exception)
            {
                return null;
            }
        }

        private static string GetWsClassName(string wsUrl) 
        { 
            string[] parts = wsUrl.Split('/'); 
            string[] pps = parts[parts.Length - 1].Split('.'); 
            return pps[0];        }      }下面是调用： object tablejhinfo = WebServiceHelper.InvokeWebService(Form2.m_web_address,"GetIhDatabase",new Object[] {stt,jhname });而中的Form2.m_web_address是我的WebService的地址，因为我放在.config中的。GetIhDatabase是我的调用的方法名，后面是方法的参数。