C# 动态调用webservice

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web.Services;
using System.CodeDom;
using System.CodeDom.Compiler;
using System.Web.Services.Description;
using System.Web.Services.Protocols;
using System.Xml.Serialization;
using System.Reflection;
using Microsoft.CSharp;
using System.IO;
using System.Net;
using System.Xml;

namespace HostTest
{
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，在这里是写死的，大家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[0].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 = icc.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;
}
}
}
}

string _url = "http://localhost:8888/Host.asmx";
object str = WebServiceAgent.InvokeWebService(_url, "disk", null) ;
dataGridView1.DataSource = str;