C# 动态调用 webservice 的类

封装这个类是为之后使用 webservice 不用添加各种引用了。

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Linq;

using System.Tex

using System.Net;

using System.IO;

using System.Web.Services.Description;

using System.CodeDom;

using Microsoft.CSharp;

using System.CodeDom.Compiler;

 class WebServiceAgent

    {

        /// <summary>

        /// 实例化WebServices

        /// </summary>

        /// <param name="url">WebServices地址</param>

        /// <param name="methodname">调用的方法</param>

        /// <param name="args">把webservices里需要的参数按顺序放到这个object[]里</param>

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

        {

            //这里的namespace是需引用的webservices的命名空间，我没有改过，也可以使用。也可以加一个参数从外面传进来。

            string @namespace = "client";

            try

            {

                //获取WSDL

                WebClient wc = new WebClient();

                Stream stream = wc.OpenRead(url + "?WSDL");

                ServiceDescription sd = ServiceDescription.Read(stream);

                string classname = sd.Services[].Name;

                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 = csc.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);

            }

            catch

            {

                return null;

            }

        }

    }