using System;
using System.CodeDom.Compiler;
using System.CodeDom;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;
using System.Xml.Serialization;
using System.Web;
using System.Xml.Serialization;
using System.Web.Caching;
using System.Web.Services.Description;

namespace ApiTest1
{
    internal class WebServiceHelper
    {
        /// <summary>
        /// 生成dll文件保存到本地
        /// </summary>
        /// <param name="url">WebService地址</param>
        /// <param name="className">類名</param>
        /// <param name="methodName">方法名</param>
        /// <param name="filePath">保存dll文件的路徑</param>
        public static void CreateWebServiceDLL(string url, string className, string methodName, string filePath)
        {
            // 1. 使用 WebClient 下載 WSDL 信息。
            WebClient web = new WebClient();
            Stream stream = web.OpenRead(url + "?WSDL");
            // 2. 創(chuàng)建和格式化 WSDL 文檔。
            ServiceDescription description = ServiceDescription.Read(stream);
            //如果不存在就創(chuàng)建file文件夾
            if (Directory.Exists(filePath) == false)
            {
                Directory.CreateDirectory(filePath);
            }

            if (File.Exists(filePath + className + "_" + methodName + ".dll"))
            {
                //判斷緩存是否過期
                var cachevalue = HttpRuntime.Cache.Get(className + "_" + methodName);
                if (cachevalue == null)
                {
                    //緩存過期刪除dll
                    File.Delete(filePath + className + "_" + methodName + ".dll");
                }
                else
                {
                    // 如果緩存沒有過期直接返回
                    return;
                }
            }

            // 3. 創(chuàng)建客戶端代理代理類。
            ServiceDescriptionImporter importer = new ServiceDescriptionImporter();
            // 指定訪問協(xié)議。
            importer.ProtocolName = "Soap";
            // 生成客戶端代理。
            importer.Style = ServiceDescriptionImportStyle.Client;
            importer.CodeGenerationOptions = CodeGenerationOptions.GenerateProperties | CodeGenerationOptions.GenerateNewAsync;
            // 添加 WSDL 文檔。
            importer.AddServiceDescription(description, null, null);
            // 4. 使用 CodeDom 編譯客戶端代理類。
            // 為代理類添加命名空間，缺省為全局空間。
            CodeNamespace nmspace = new CodeNamespace();
            CodeCompileUnit unit = new CodeCompileUnit();
            unit.Namespaces.Add(nmspace);
            ServiceDescriptionImportWarnings warning = importer.Import(nmspace, unit);
            CodeDomProvider provider = CodeDomProvider.CreateProvider("CSharp");
            CompilerParameters parameter = new CompilerParameters();
            parameter.GenerateExecutable = false;
            // 可以指定你所需的任何文件名。
            parameter.OutputAssembly = filePath + className + "_" + methodName + ".dll";
            parameter.ReferencedAssemblies.Add("System.dll");
            parameter.ReferencedAssemblies.Add("System.XML.dll");
            parameter.ReferencedAssemblies.Add("System.Web.Services.dll");
            parameter.ReferencedAssemblies.Add("System.Data.dll");
            // 生成dll文件，并會把WebService信息寫入到dll里面
            CompilerResults result = provider.CompileAssemblyFromDom(parameter, unit);
            if (result.Errors.HasErrors)
            {
                // 顯示編譯錯誤信息
                System.Text.StringBuilder sb = new StringBuilder();
                foreach (CompilerError ce in result.Errors)
                {
                    sb.Append(ce.ToString());
                    sb.Append(System.Environment.NewLine);
                }
                throw new Exception(sb.ToString());
            }
            //記錄緩存
            var objCache = HttpRuntime.Cache;
            // 緩存信息寫入dll文件
            objCache.Insert(className + "_" + methodName, "1", null, DateTime.Now.AddMinutes(5), TimeSpan.Zero, CacheItemPriority.High, null);
        }



        /// <summary>
        /// 根據(jù)WebService的url地址獲取className
        /// </summary>
        /// <param name="wsUrl">WebService的url地址</param>
        /// <returns></returns>
        //private string GetWsClassName(string wsUrl)
        //{
        //    string[] parts = wsUrl.Split('/');
        //    string[] pps = parts[parts.Length - 1].Split('.');
        //    return pps[0];
        //}
    }
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Configuration;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace ApiTest1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void button1_Click(object sender, EventArgs e)
        {
            // 讀取配置文件，獲取配置信息
            string url = ConfigurationManager.AppSettings["WebServiceAddress"];
            string className = ConfigurationManager.AppSettings["ClassName"];
            string methodName = ConfigurationManager.AppSettings["MethodName"];
            string filePath = ConfigurationManager.AppSettings["FilePath"];
            // 調用WebServiceHelper
            WebServiceHelper.CreateWebServiceDLL(url, className, methodName, filePath);
            // 讀取dll內容
            byte[] filedata = File.ReadAllBytes(filePath + className + "_" + methodName + ".dll");
            // 加載程序集信息
            Assembly asm = Assembly.Load(filedata);
            Type t = asm.GetType(className);
            // 創(chuàng)建實例
            object o = Activator.CreateInstance(t);
            MethodInfo method = t.GetMethod(methodName);
            // 參數(shù)
            string MsgCode = textBox1.Text;
            string SendXml = textBox2.Text;
            //string UserCode = textBox3.Text;
            object[] args = { MsgCode, SendXml};
            //object[] args = { "動態(tài)調用WebService" };
            // 調用訪問，獲取方法返回值
            string value = method.Invoke(o, args).ToString();
            //輸出返回值
            MessageBox.Show($"返回值:{value}");
        }
    }
}