C# Web Service 不使用服务引用直接调用方法（转）

                                          

using Microsoft.CSharp;
using System;
using System.CodeDom;
using System.CodeDom.Compiler;
using System.IO;
using System.Net;
using System.Text;
using System.Web.Services.Description;

namespace Utils
{
public class WebServiceHelper
    {
/// <summary> 
/// 动态调用WebService 
/// </summary> 
/// <param name="url">WebService地址</param> 
/// <param name="classname">类名</param> 
/// <param name="methodname">方法名(模块名)</param> 
/// <param name="args">参数列表</param> 
/// <returns>object</returns> 
public static object InvokeWebService(string url, string classname, string methodname, object[] args)
        {
string @namespace = "ServiceBase.WebService.DynamicWebLoad";
if (classname == null || classname == "")
            {
classname = WebServiceHelper.GetClassName(url);
            }
//获取服务描述语言(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);
//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;// csc.CreateCompiler();
//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");
//编译代理类 
CompilerResults cr = csc.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);
        }

private static string GetClassName(string url)
        {
string[] parts = url.Split('/');
string[] pps = parts[parts.Length - 1].Split('.');
return pps[0];
        }

    }
}