动态调用Webservice

private object InvokeWebservice(string url, string @namespace, string classname, string methodname, object[] args)

         {

              try

              {

                   System.Net.WebClient wc = new System.Net.WebClient();

                   System.IO.Stream stream = wc.OpenRead(url+"?WSDL");

                   System.Web.Services.Description.ServiceDescription sd = System.Web.Services.Description.ServiceDescription.Read(stream);

                   System.Web.Services.Description.ServiceDescriptionImporter sdi = new System.Web.Services.Description.ServiceDescriptionImporter();

                   sdi.AddServiceDescription(sd,"","");

                   System.CodeDom.CodeNamespace cn = new System.CodeDom.CodeNamespace(@namespace);

                   System.CodeDom.CodeCompileUnit ccu = new System.CodeDom.CodeCompileUnit();

                   ccu.Namespaces.Add(cn);

                   sdi.Import(cn,ccu);

                   Microsoft.CSharp.CSharpCodeProvider csc = new Microsoft.CSharp.CSharpCodeProvider();

                   System.CodeDom.Compiler.ICodeCompiler icc = csc.CreateCompiler();

                   System.CodeDom.Compiler.CompilerParameters cplist = new System.CodeDom.Compiler.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");

                   System.CodeDom.Compiler.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());

                   }

                   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));

              }

         }