C# .Net动态调用webService

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 HTTPS

{

    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));

            }

        }

        private static string GetWsClassName(string wsUrl)

        {

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

            string[] pps = parts[parts.Length - 1].Split('.');

            return pps[0];

        }

    }

}

调用

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();