/* 调用方式

          *   string url = "http://www.webservicex.net/globalweather.asmx" ;

          *   string[] args = new string[2] ;

          *   args[0] = "Hangzhou";

          *   args[1] = "China" ;

          *   object result = WebServiceHelper.InvokeWebService(url ,"GetWeather" ,args) ;

          *   Response.Write(result.ToString());

          */

         public class WebServiceHelper

         {

             #region InvokeWebService

             /// < summary>

             /// 动态调用web服务

             /// < /summary>

             /// < param name="url">WSDL服务地址< /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);

             }

             /// < summary>

             /// 动态调用web服务

             /// < /summary>

             /// < param name="url">WSDL服务地址< /param>

             /// < param name="classname">类名< /param>

             /// < param name="methodname">方法名< /param>

             /// < param name="args">参数< /param>

             /// < returns>< /returns>

             public static object InvokeWebService(string url, string classname, string methodname, object[] args)

             {

                 string @namespace = "EnterpriseServerBase.WebService.DynamicWebCalling";

                 if ((classname == null) || (classname == ""))

                 {

                     classname = WebServiceHelper.GetWsClassName(url);

                 }

                 try

                 {

                     //获取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 icc = new CSharpCodeProvider();

                     //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");

                     //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());

                     }

                     //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);

                     /*

                     PropertyInfo propertyInfo = type.GetProperty(propertyname);

                     return propertyInfo.GetValue(obj, null);

                     */

                 }

                 catch (Exception ex)

                 {

                     throw new Exception(ex.InnerException.Message, new Exception(ex.InnerException.StackTrace));

                 }

             }

             private static string GetWsClassName(string wsUrl)

             {

                 string[] parts = wsUrl.Split('/');

                 string[] pps = parts[parts.Length - ].Split('.');

                 return pps[];

             }

             #endregion

         }