동적 호출 웹 서비스

/**//// 
        ///        ，    WebService  
        /// 
        /// WebService http     
        ///     WebService     
        ///     WebService   （         ）
        ///     WebService    
        ///     
        /// WebService     
        /// 
        ///       ，    Exception。      ，      。
        ///               ：
        /// 1、    WebService   ，CompileAssembly  。
        /// 2、WebService      。
        /// 
        /// 
        /// 
        /// object obj = InvokeWebservice("http://localhost/GSP_WorkflowWebservice/common.asmx",
                                 "Genersoft.Platform.Service.Workflow","Common","GetToolType",new object[]{"1"});
        /// 
        /// 
        public static 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));
            }
        }