WebServiceHelper代码：

using Microsoft.CSharp;using System;using System.CodeDom;using System.CodeDom.Compiler;using System.Collections.Generic;using System.IO;using System.Linq;using System.Net;using System.Reflection;using System.Text;using System.Web.Services.Description;using System.Xml.Serialization;namespace SunCreate.HaiKang8600WebService.Utils{    /// 
    /// 动态调用WebService    /// 
    public static class WebServiceHelper    {        /// 
        /// 动态调用WebService        /// 
        /// WebService地址        /// 命名空间        /// 类名        /// 方法名(模块名)        /// 参数列表        public static object InvokeWebService(string url, string strNamespace, string className, string methodName, object[] args)        {            try            {                WebClient webClient = new WebClient();                Stream stream = webClient.OpenRead(url); //获取服务描述语言(WSDL)                ServiceDescription serviceDescription = ServiceDescription.Read(stream); //通过直接从 Stream实例加载 XML 来初始化ServiceDescription类的实例。                ServiceDescriptionImporter serviceDescriptionImporter = new ServiceDescriptionImporter();                serviceDescriptionImporter.AddServiceDescription(serviceDescription, null, null);                //生成客户端代理类代码                CodeNamespace codeNamespace = new CodeNamespace(strNamespace);  //CodeNamespace表示命名空间声明。                CodeCompileUnit codeCompileUnit = new CodeCompileUnit();                codeCompileUnit.Namespaces.Add(codeNamespace);                serviceDescriptionImporter.Import(codeNamespace, codeCompileUnit);                CSharpCodeProvider csharpCodeProvider = new CSharpCodeProvider();                ICodeCompiler iCodeCompiler = csharpCodeProvider.CreateCompiler();//取得C#程式码编译器的执行个体                //设定编译器的参数                CompilerParameters compilerParameters = new CompilerParameters();//创建编译器的参数实例                compilerParameters.GenerateExecutable = false;                compilerParameters.GenerateInMemory = true;                compilerParameters.ReferencedAssemblies.Add("System.dll");                compilerParameters.ReferencedAssemblies.Add("System.XML.dll");                compilerParameters.ReferencedAssemblies.Add("System.Web.Services.dll");                compilerParameters.ReferencedAssemblies.Add("System.Data.dll");                //编译代理类                CompilerResults compilerResults = iCodeCompiler.CompileAssemblyFromDom(compilerParameters, codeCompileUnit);                if (true == compilerResults.Errors.HasErrors)                {                    StringBuilder sb = new StringBuilder();                    foreach (CompilerError ce in compilerResults.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 = compilerResults.CompiledAssembly;                Type type = assembly.GetType(strNamespace + "." + className, true, true);                object obj = Activator.CreateInstance(type);                System.Reflection.MethodInfo methodInfo = type.GetMethod(methodName); //MethodInfo 的实例可以通过调用GetMethods或者Type对象或派生自Type的对象的GetMethod方法来获取，还可以通过调用表示泛型方法定义的 MethodInfo 的MakeGenericMethod方法来获取。                return methodInfo.Invoke(obj, args);            }            catch (Exception ex)            {                LogUtil.LogError(ex, "动态调用WebService 错误");                return null;            }        }    }}

 使用示例：

string url = "http://172.16.36.26:8080/attachment/services/AttachmentService?wsdl";object[] args = new object[2];args[0] = "1";args[1] = "1";object str = WebServiceHelper.InvokeWebService(url, "service.webservice", "AttachmentService", "checkGrade", args);string sstr = str.ToString();