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.ServiceModel;

using System.ServiceModel.Security;

using System.Text;

using System.Threading.Tasks;

using System.Web.Services.Description;

public class WebServiceHelper

{

    #region InvokeWebService

    //动态调用web服务

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

    {

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

    }

    public object InvokeWebService(string url, string classname,

        string methodname, object[] args)

    {

        //string @namespace = "EnterpriseServerBase.WebService.DynamicWebCalling";

        string @namespace = "FrameWork.WebService.DynamicWebServiceCalling";

        //FrameWork.WebService.DynamicWebServiceCalling

        if (string.IsNullOrEmpty(classname))

        {

            classname = GetWsClassName(url);

        }

        //获取WSDL

        WebClient wc = new WebClient();

        url = url.Trim().ToLower().Trim("?wsdl".ToCharArray()) + "?WSDL";

        Stream stream = wc.OpenRead(url);

        ServiceDescription sd = ServiceDescription.Read(stream);

        sd.Bindings.Add(CreateBinding("MaxBufferSize", ""));

        sd.Bindings.Add(CreateBinding("maxReceivedMessageSize", ""));

        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);

        CodeDomProvider csc = CodeDomProvider.CreateProvider("CSharp");

        //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)

        {

            StringBuilder sb = new StringBuilder();

            foreach (CompilerError ce in cr.Errors)

            {

                sb.Append(ce.ToString());

                sb.Append(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);

    }

    private Binding CreateBinding(string name, string doc)

    {

        Binding bd = new Binding();

        bd.Name = name;

        bd.Documentation = doc;

        return bd;

    }

    private string GetWsClassName(string wsUrl)

    {

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

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

        return pps[];

    }

    #endregion

}