(C#)动态调用web服务

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Web; 
using System.Net; 
using System.IO; 
using System.Web.Services.Description; 
using System.CodeDom; 
using Microsoft.CSharp; 
using System.CodeDom.Compiler; 
using System.Reflection;


namespace TY.SmartSoft.WebApp.Webservice
{
    public class WSHelper
    {
        /// < 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 WSHelper.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 = WSHelper.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));
            }
        }
        /// <summary>
        /// 获得类的名字
        /// </summary>
        /// <param name="url">网址</param>
        /// <returns>类型名</returns>
        private static string GetWsClassName(string wsUrl)
        {
            string[] parts = wsUrl.Split('/');
            string[] pps = parts[parts.Length - 1].Split('.');
            return pps[0];
        }
    }
} 
//调用样例:
//string url = "http://webservice.webxml.com.cn/WebServices/TrainTimeWebService.asmx"; 
//string[] args = new string[2]; 
//args[0] = "k123"; 
//args[1] = ""; 
//object result = WSHelper.InvokeWebService(url, "getDetailInfoByTrainCode", args); 
//DataSet ds = (DataSet)result; 
//this.GridView1.DataSource = ds; 
//this.GridView1.DataBind();