dynamic webservice

  1 using  System;
  2 using  System.Net;
  3 using  System.IO;
  4 using  System.CodeDom;
  5 using  Microsoft.CSharp;
  6 using  System.CodeDom.Compiler;
  7 using  System.Web.Services.Description;
  8 using  System.Web.Services.Protocols;
  9
 10 namespace  HB.Common
 11 {
 12    /**//* 调用方式
 13     *   string url = "http://www.webservicex.net/globalweather.asmx" ;
 14     *   string[] args = new string[2] ;
 15     *   args[0] = "Hangzhou";
 16     *   args[1] = "China" ;
 17     *   object result = WebServiceHelper.InvokeWebService(url ,"GetWeather" ,args) ;
 18     *   Response.Write(result.ToString());
 19     */
 20    public class WebServiceHelper
 21    {
 22        InvokeWebService#region InvokeWebService
 23        /**//// <summary>
 24        /// 动态调用web服务
 25        /// </summary>
 26        /// <param name="url">WSDL服务地址</param>
 27        /// <param name="methodname">方法名</param>
 28        /// <param name="args">参数</param>
 29        /// <returns></returns>
 30        public static object InvokeWebService(string url, string methodname, object[] args)
 31        {
 32            return WebServiceHelper.InvokeWebService(url, null, methodname, args);
 33        }
 34
 35        /**//// <summary>
 36        /// 动态调用web服务
 37        /// </summary>
 38        /// <param name="url">WSDL服务地址</param>
 39        /// <param name="classname">类名</param>
 40        /// <param name="methodname">方法名</param>
 41        /// <param name="args">参数</param>
 42        /// <returns></returns>
 43        public static object InvokeWebService(string url, string classname, string methodname, object[] args)
 44        {
 45            string @namespace = "EnterpriseServerBase.WebService.DynamicWebCalling";
 46            if ((classname == null) || (classname == ""))
 47            {
 48                classname = WebServiceHelper.GetWsClassName(url);
 49            }
 50
 51            try
 52            {
 53                //获取WSDL
 54                WebClient wc = new WebClient();
 55                Stream stream = wc.OpenRead(url + "?WSDL");
 56                ServiceDescription sd = ServiceDescription.Read(stream);
 57                ServiceDescriptionImporter sdi = new ServiceDescriptionImporter();
 58                sdi.AddServiceDescription(sd, "", "");
 59                CodeNamespace cn = new CodeNamespace(@namespace);
 60
 61                //生成客户端代理类代码
 62                CodeCompileUnit ccu = new CodeCompileUnit();
 63                ccu.Namespaces.Add(cn);
 64                sdi.Import(cn, ccu);
 65                CSharpCodeProvider icc = new CSharpCodeProvider();
 66
 67                //设定编译参数
 68                CompilerParameters cplist = new CompilerParameters();
 69                cplist.GenerateExecutable = false;
 70                cplist.GenerateInMemory = true;
 71                cplist.ReferencedAssemblies.Add("System.dll");
 72                cplist.ReferencedAssemblies.Add("System.XML.dll");
 73                cplist.ReferencedAssemblies.Add("System.Web.Services.dll");
 74                cplist.ReferencedAssemblies.Add("System.Data.dll");
 75
 76                //编译代理类
 77                CompilerResults cr = icc.CompileAssemblyFromDom(cplist, ccu);
 78                if (true == cr.Errors.HasErrors)
 79                {
 80                    System.Text.StringBuilder sb = new System.Text.StringBuilder();
 81                    foreach (System.CodeDom.Compiler.CompilerError ce in cr.Errors)
 82                    {
 83                        sb.Append(ce.ToString());
 84                        sb.Append(System.Environment.NewLine);
 85                    }
 86                    throw new Exception(sb.ToString());
 87                }
 88
 89                //生成代理实例，并调用方法
 90                System.Reflection.Assembly assembly = cr.CompiledAssembly;
 91                Type t = assembly.GetType(@namespace + "." + classname, true, true);
 92                object obj = Activator.CreateInstance(t);
 93                System.Reflection.MethodInfo mi = t.GetMethod(methodname);
 94
 95                return mi.Invoke(obj, args);
 96
 97                /**//*
 98                PropertyInfo propertyInfo = type.GetProperty(propertyname);
 99                return propertyInfo.GetValue(obj, null);
100                */
101            }
102            catch (Exception ex)
103            {
104                throw new Exception(ex.InnerException.Message, new Exception(ex.InnerException.StackTrace));
105            }
106        }
107
108        private static string GetWsClassName(string wsUrl)
109        {
110            string[] parts = wsUrl.Split('/');
111            string[] pps = parts[parts.Length - 1].Split('.');
112
113            return pps[0];
114        }
115        #endregion
116    }
117}
118