using System.Net;using System.IO;using System.Web.Services.Description;using System.CodeDom;using System.CodeDom.Compiler;using System.Reflection;using System;using System.Xml.Serialization;namespace WebServiceToOracle.Common{    /// <summary>    /// Web服务操作类    /// Author:梁    /// Time：2014-4-17    /// </summary>    public class WebServiceHelper    {        /// <summary>        /// 动态调用WebService        /// </summary>        /// <param name="url">WebService地址</param>        /// <param name="function">欲调用的WebService接口函数</param>        /// <param name="parameters">接口参数</param>        /// <returns>接口数据</returns>        public static string DynamicInvocationWebService(string url,string function,string[] parameters)         {            WebClient client = new WebClient();            if (url.IndexOf("?WSDL") == -1)             {                url = url + "?WSDL";            }            Stream stream = client.OpenRead(url);            ServiceDescription description = ServiceDescription.Read(stream);            //创建客户端代理代理类。            ServiceDescriptionImporter importer = new ServiceDescriptionImporter();            //指定访问协议。            importer.ProtocolName = "Soap";            //生成客户端代理。            importer.Style = ServiceDescriptionImportStyle.Client;             importer.CodeGenerationOptions = CodeGenerationOptions.GenerateProperties | CodeGenerationOptions.GenerateNewAsync;            //添加WSDL文档。            importer.AddServiceDescription(description, null, null);            //命名空间            CodeNamespace nmspace = new CodeNamespace();            nmspace.Name = "SearchAmountOfProduct";            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;            //输出程序集的名称            parameter.OutputAssembly = "DynamicInvocationWebService.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");            CompilerResults result = provider.CompileAssemblyFromDom(parameter, unit);            if (result.Errors.HasErrors)            {                // 显示编译错误信息            }            //加载前面生成的程序集            Assembly asm = Assembly.LoadFrom("DynamicInvocationWebService.dll");            Type t = asm.GetType("SearchAmountOfProduct.SearchAmountOfProduct");            object o = Activator.CreateInstance(t);            MethodInfo method = t.GetMethod(function);            String item = (String)method.Invoke(o, parameters);            return item;        }    }}