.net动态调用wsdl

var result = WebServiceHelper.InvokeWebService("http://demo.com/iSignatureServer/services/KeyInfoService", "KeyInfoServiceService", "getKeyinfoByKeySN", new object[] { keySn });
var str = JsonConvert.SerializeObject(result);
var info = JsonConvert.DeserializeObject<keyinfo>(str);
var pwd = info.password;

public class WebServiceHelper
    {
        /// <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 = "Seasky.SFP.Claims.Entity";
            if (classname == null || 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);
            //生成客户端代理类代码             
            CodeCompileUnit ccu = new CodeCompileUnit();
            ccu.Namespaces.Add(cn);
            sdi.Import(cn, ccu);
            CSharpCodeProvider csc = new CSharpCodeProvider();
            //ICodeCompiler icc = csc;// csc.CreateCompiler();            
            //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 = csc.CompileAssemblyFromDom(cplist, ccu);
            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 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);
        }

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

    public class keyinfo
    {
        public string password { get; set; }
    }