#region 动态生成WebService程序集   CreateWSAssembly

        /// <summary>

        /// 动态生成WebService程序集

        /// </summary>

        /// <param name="DiyWsNameSpace">定义的WebService的命名空间</param>

        /// <param name="WebServiceSortUrl">除网站根目录后的WebServiceUrl</param>

        /// <param name="myNetWorkCredential">跨服务器时所使用的用户身份，如在编译环境下 设置为null即可</param>

        /// <returns>WebService程序集</returns>

        private System.Reflection.Assembly CreateWSAssembly(String DiyWsNameSpace, string WebServiceUrl, System.Net.NetworkCredential myNetWorkCredential)

        {

            #region 跟据WebServiec 生成客户端可用的代码

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

            if (myNetWorkCredential != null)

                webClient.Credentials = myNetWorkCredential;

            else

                webClient.Credentials = System.Net.CredentialCache.DefaultCredentials;

            System.IO.Stream stream = webClient.OpenRead(WebServiceUrl + "?WSDL");

            //用于创建或格式化WebService的服务描述语言的文档文件类

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

            //用户生成WebService 客户端代理类

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

            serviceDescriptionImporter.AddServiceDescription(serviceDescription, "", "");

            System.CodeDom.CodeNamespace coDeNamespace = new System.CodeDom.CodeNamespace(DiyWsNameSpace);

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

            codeCompileUnit.Namespaces.Add(coDeNamespace);

            serviceDescriptionImporter.Import(coDeNamespace, codeCompileUnit);

            #endregion

            //对代码生成器和代码编译器的实例的访问的提供程序

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

            //获取C#代码编译器的实例

            System.CodeDom.Compiler.ICodeCompiler iCompiler = CSharpProvider.CreateCompiler();

            //调用实例所要用的参数

            System.CodeDom.Compiler.CompilerParameters cParams = new System.CodeDom.Compiler.CompilerParameters();

            //是否生成可执行文件

            cParams.GenerateExecutable = false;

            //是否在内存中生成输出

            cParams.GenerateInMemory = true;

            //要使用的程序集

            cParams.ReferencedAssemblies.Add("System.dll");

            cParams.ReferencedAssemblies.Add("System.XML.dll");

            cParams.ReferencedAssemblies.Add("System.Web.Services.dll");

            cParams.ReferencedAssemblies.Add("System.Data.dll");

            //从编译器返回的编译的结果类

            System.CodeDom.Compiler.CompilerResults cResults = iCompiler.CompileAssemblyFromDom(cParams, codeCompileUnit);

            //是否存在错误信息

            if (cResults.Errors.HasErrors)

            {

                System.Text.StringBuilder sb = new System.Text.StringBuilder();

                foreach (System.CodeDom.Compiler.CompilerError ce in cResults.Errors)

                {

                    sb.Append(ce.ToString());

                    sb.Append(System.Environment.NewLine);

                }

                throw new Exception(sb.ToString());

            }

            //获取程序集

            System.Reflection.Assembly assembly = cResults.CompiledAssembly;

            return assembly;

        }

        #endregion

            //跨域访问调用

            System.Reflection.Assembly SPSiteDataAssembly1 = this.CreateWSAssembly("自定义命名空间", "WebService地址", new System.Net.NetworkCredential("用户名","密码","域名"));

            //本地调用

            //System.Reflection.Assembly SPSiteDataAssembly = this.CreateWSAssembly("自定义命名空间", "WebService地址", null);

            //获得类型

            Type SiteDataType = SPSiteDataAssembly.GetType("自定义命名空间.类名", true, true);

            //实例对象

            Object SiteData = Activator.CreateInstance(SiteDataType);

            //获取方法信息

            System.Reflection.MethodInfo mi = SiteDataType.GetMethod("方法名");

            //方法中需要的参数

            Object[] parmas = new Object[] { };

            //调用方法返回结果

            object objresult = mi.Invoke(SiteData, parmas);