WebService – 2.动态调用WebService

WebService动态调用示意图

WebService相关知识
代码文档对象模型CodeDom的使用
编程使用C#编译器
反射

1.先建动态调用辅助类 WebServiceHelper.cs

 using System;

 using System.Collections.Generic;

 using System.Linq;

 using System.Text;

 using System.IO;

 using System.Configuration;

 using System.CodeDom;

 using System.CodeDom.Compiler;

 using System.Net;

 using System.Web.Services;

 using System.Web.Services.Description;

 using Microsoft.CSharp;

 namespace InvokeWebService

 {

     public static class WebServiceHelper

     {

         /// <summary>

         /// 动态调用WebService

         /// </summary>

         /// <param name="Url">WebService地址</param>

         /// <param name="methodname">WebService方法名（模块名）</param>

         /// <param name="args">调用接口的参数列表</param>

         /// <returns></returns>

         public static object InvokeWebService(string Url,string methodname,object[] args)

         {

             return InvokeWebService(Url, null, methodname, args);

         }

         /// <summary>

         /// 动态调用WebService

         /// </summary>

         /// <param name="Url">WebService地址</param>

         /// <param name="className">类名</param>

         /// <param name="methodname">WebService方法名</param>

         /// <param name="args">调用接口的参数列表</param>

         /// <returns></returns>

         public static object InvokeWebService(string Url, string className, string methodname, object[] args)

         {

             string @namespace = "ServiceBase.WebSerice.DynamicWebLoad";

             if (className == null || className == "")

             {

                 className = WebServiceHelper.GetClassName(Url);

             }

             //1.服务描述语言（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);

             //2.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();

             //3.设定编译器的参数

             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");

             //4.变异代理类

             CompilerResults cr = icc.CompileAssemblyFromDom(cplist, ccu);

             if (true==cr.Errors.HasErrors)

             {

                 System.Text.StringBuilder sb = new StringBuilder();

                 foreach (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);

         }

         //获取类名

         private static string GetClassName(string url)

         {

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

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

             return pps[];

         }

     }

 }

WebServiceHelper.cs

2.建WebService，  Service1.asmx

 using System;

 using System.Collections.Generic;

 using System.Linq;

 using System.Web;

 using System.Web.Services;

 namespace InvokeServices

 {

     /// <summary>

     /// Service1 的摘要说明

     /// </summary>

     [WebService(Namespace = "http://tempuri.org/")]

     [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]

     [System.ComponentModel.ToolboxItem(false)]

     // 若要允许使用 ASP.NET AJAX 从脚本中调用此 Web 服务，请取消注释以下行。

     // [System.Web.Script.Services.ScriptService]

     public class Service1 : System.Web.Services.WebService

     {

         [WebMethod]

         public string HelloWorld(string Temp1,string Temp2)

         {

             return string.Format("参数1：{0},参数2：{1}", Temp1, Temp2);

         }

     }

 }

Service1.asmx

3.建应用程序

 using System;

 using System.Collections.Generic;

 using System.ComponentModel;

 using System.Data;

 using System.Drawing;

 using System.Linq;

 using System.Text;

 using System.Windows.Forms;

 namespace Test

 {

     public partial class Form1 : Form

     {

         public Form1()

         {

             InitializeComponent();

         }

         private void button1_Click(object sender, EventArgs e)

         {

             string url = "http://localhost:4547/Service1.asmx";

             string[] args = new string[];

             args[] = this.textBox1.Text;

             args[] = this.textBox2.Text;

             object result = InvokeWebService.WebServiceHelper.InvokeWebService(url, "HelloWorld", args);

             this.textBox3.Text = result.ToString();

         }

     }

 }

Form1.cs