动态调用web服务(转)

说明：已知Web服务地址、方法名和参数的情况下动态调用Web服务的方法

实现：

　　1.动态调用辅助类WebServiceHelper

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

namespace DinamicWebService
{
    public class WebServiceHelper
    {
        #region InvokeWebService
        //动态调用web服务
        public static object InvokeWebService(string url, string methodname)
        {
            return InvokeWebService(url, null, methodname, null);
        }

        public static object InvokeWebService(string url, string methodname, object[] args)
        {
            return InvokeWebService(url, null, methodname, args);
        }

        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 csc = new CSharpCodeProvider();
                ICodeCompiler icc = csc.CreateCompiler();

                //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
                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);
            }
            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];
        }
        #endregion
    }
}

　　2.测试.

　　   http://www.webservicex.net/globalweather.asmx 服务来获取各大城市的天气状况

using System;
using System.Collections.Generic;
using System.Text;
using DinamicWebService;

namespace Test
{
    class Program
    {
        static void Main(string[] args)
        {
            string url = "http://www.webservicex.net/globalweather.asmx";
            object[] parameters = new object[2];
            Console.Write("请输入城市：");
            parameters[0] = Console.ReadLine();
            Console.Write("请输入国家：");
            parameters[1] = Console.ReadLine();
            object result = WebServiceHelper.InvokeWebService(url, "GetWeather", parameters);
            Console.WriteLine(result.ToString());
            Console.ReadKey();
        }
    }
}

 补充说明：以上代码部分，由于每次调用一个Web服务的一个方法的时候都会重新生成客户端代理，解决办法可以在硬盘上生成临时的程序集文件，然后直接调用那个程序集文件，可以参考http://www.rainsts.net/article.asp?id=304的第2种方法进行相关的修改！

 

 

 附件：DinamicWebService.7z