动态调用webservice

调用Webservice的方法一般是通过右击项目--》添加服务引用--》输入Webservice地址--》前往--》确定，这样可以顺利调用服，但是需要注意的一点是：如果上面的方法是在非启动项项目（比如某个类库）中添加的，在该项目下会自动生成一个app.config文件，而在主配置文件web.config中并没有自动添加上该webservice的标记，这样运行会出现错误，说找不到配置信息等等……所有还需要把app.config中的<system.serviceModel>……</system.serviceModel>这段配置添加到web.config的<configuration>……</configuration>标记中，这样运行就不会出问题了。如果以后服务地址发生了变化，也只需要修改web.config中的地址就行了。

using System;using System.Collections;using System.Reflection;using System.Web.Services;using System.Web.Services.Protocols;using System.Web.Services.Description;using System.CodeDom;using System.CodeDom.Compiler;using System.Net;using System.Web;namespace Kayang.WebService{    /// <summary>    /// WebServiceProxy 的摘要说明。    /// </summary>    public sealed class WebServiceProxy    {        private static Hashtable _assenblyCache = null;  //缓存提高效率        public WebServiceProxy()        {        }        //url:服务地址　　　　 //methodname：方法名字         //args:方法的参数        public static object InvokeWebservice(string url, string nsClassName, string methodname, params object[] args)        {            return InvokeWebservice(url, nsClassName, methodname, 100000, args);        }        public static object InvokeWebservice(string url, string nsClassName, string methodname, int timeout, params object[] args)        {            if (args.Length == 1 && args[0] is ArrayList)            {                args = (args[0] as ArrayList).ToArray();            }            try            {                int li = nsClassName.LastIndexOf('.');                string @namespace = (li == -1 ? "" : nsClassName.Substring(0, li));                Assembly assembly;                if (_assenblyCache == null)                {                    _assenblyCache = new Hashtable();                }                if (_assenblyCache.ContainsKey(url.ToUpper()))                {                    assembly = (Assembly)_assenblyCache[url.ToUpper()];                }                else                {                    System.Net.WebClient wc = new System.Net.WebClient();                    System.IO.Stream stream = wc.OpenRead(url + "?WSDL");                    //Configuration.SoapEnvelopeProcessingElement se = new Configuration.SoapEnvelopeProcessingElement();                    //se.ReadTimeout = 15000;                    ServiceDescription sd = ServiceDescription.Read(stream);                    ServiceDescriptionImporter sdi = new ServiceDescriptionImporter();                    sdi.AddServiceDescription(sd, "", "");                    CodeNamespace cn = new CodeNamespace(@namespace);                    CodeCompileUnit ccu = new CodeCompileUnit();                    ccu.Namespaces.Add(cn);                    sdi.Import(cn, ccu);                    Microsoft.CSharp.CSharpCodeProvider csc = new Microsoft.CSharp.CSharpCodeProvider();                    ICodeCompiler icc = csc.CreateCompiler();                    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");                    CompilerResults cr = icc.CompileAssemblyFromDom(cplist, ccu);                    if (true == cr.Errors.HasErrors)                    {                        System.Text.StringBuilder sb = new System.Text.StringBuilder();                        foreach (CompilerError ce in cr.Errors)                        {                            sb.Append(ce.ToString());                            sb.Append(System.Environment.NewLine);                        }                        throw new Exception(sb.ToString());                    }                    assembly = cr.CompiledAssembly;                    _assenblyCache[url.ToUpper()] = assembly;                }                Type t = null;                if (String.IsNullOrEmpty(nsClassName))                {                    t = assembly.GetTypes()[0];                }                else                {                    t = assembly.GetType(nsClassName, true, true);                }                MethodInfo mi = null;                if (String.IsNullOrEmpty(methodname))                {                    mi = t.GetMethods(BindingFlags.DeclaredOnly | BindingFlags.Public | BindingFlags.Instance)[0];                }                else                {                    mi = t.GetMethod(methodname);                }                SoapHttpClientProtocol obj = Activator.CreateInstance(t) as SoapHttpClientProtocol;                SetCookie(url, obj);                //obj.Credentials = System.Net.CredentialCache.DefaultNetworkCredentials;                obj.Timeout = timeout;                return mi.Invoke(obj, args);            }            catch (Exception ex)            {                throw new Exception(ex.InnerException.Message, new Exception(ex.InnerException.StackTrace));            }        }        /// <summary>        /// 传入Cookie，使对方可以使用当前Session        /// By 黄正 2009-12-6        /// </summary>        /// <param name="url"></param>        /// <param name="obj"></param>        private static void SetCookie(string url, SoapHttpClientProtocol obj)        {            HttpContext ctx = HttpContext.Current;            if (ctx != null)            {                CookieContainer cc = new CookieContainer();                foreach (string cookieName in ctx.Request.Cookies.AllKeys)                {                    cc.SetCookies(new Uri(url), cookieName + "=" + ctx.Request.Cookies[cookieName].Value);                }                //req.Headers.Add(HttpRequestHeader.Cookie, Request.Headers["Cookie"]);                obj.CookieContainer = cc;            }        }    }}

调用：

string url = "http://webservice.webxml.com.cn/webservices/qqOnlineWebService.asmx";string @namespace="";string methodname = "qqCheckOnline";//需要调用的webservice中的方法string Invoke = "123456";//QQ号码string result = WebService.WebServiceProxy.InvokeWebservice(url, @namespace, methodname, Invoke).ToString();

转载：http://www.cnblogs.com/yinluhui0229/archive/2012/08/17/2644437.html