原来做项目的时候使用webservice大部分都是用的静态连接方式获取数据，可是缺点就是部能实施的更新webservice，总是得重新生成才行，如果项目一旦部署webservice再有修改那么静态的引用也得相应的修改和更新，很不爽。
所以就想到了用动态的webservice来实现，不过缺点就是效率低了，响应速度真是让人着急。
网上有很多例子动态webservice的例子如：
//http://blog.csdn.net/lzy_1515 public class link_webservice { public link_webservice() { // //TODO: 在此处添加构造函数逻辑 // } /// <summary> /// 动态调用WebService /// </summary> /// <param name="url">WebService地址</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 methodname, object[] args) { return InvokeWebService(url, null, methodname, args); } //http://blog.csdn.net/lzy_1515 /// <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 = 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.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 = icc.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]; } //http://blog.csdn.net/lzy_1515
这个例子可以实现动态连接可是效率不是很高，因为每次请求的时候都重新生成，所以慢。
后来想了想要是加了缓存会不会提高一些速度，经过改进成功了，第一次的时候他会进行生成，以后在进来
就去缓存里去取了，响应时间0秒。
修改后的代码如下：
// http://blog.csdn.net/lzy_1515 //string url = "http://url.asmx"; //string[] args = new string[2]; //args[0] = 0; //args[1] = "12"; //object result = DynamicWebServices.InvokeWebService(url, "Getcc", args); //this.label_Result.Text = result.ToString(); public class DynamicWebServices { static SortedList<string, Type> _typeList = new SortedList<string, Type>(); #region InvokeWebService static string GetCacheKey(string url, string className) { return url.ToLower() + className; } static Type GetTypeFromCache(string url, string className) { string key = GetCacheKey(url, className); foreach (KeyValuePair<string, Type> pair in _typeList) { if (key == pair.Key) { return pair.Value; } } return null; } static Type GetTypeFromWebService(string url, string className) { string @namespace = "EnterpriseServerBase.WebService.DynamicWebCalling"; if ((className == null) || (className == "")) { className = GetWsClassName(url); } //http://blog.csdn.net/lzy_1515 //获取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.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); return t; } //动态调用web服务 public static object InvokeWebService(string url, string methodName, object[] args) { return InvokeWebService(url, null, methodName, args); } public static object InvokeWebService(string url, string className, string methodName, object[] args) { try { Type t = GetTypeFromCache(url, className); if (t == null) { t = GetTypeFromWebService(url, className); //添加到缓冲中 string key = GetCacheKey(url, className); _typeList.Add(key, t); } object obj = Activator.CreateInstance(t); MethodInfo mi = t.GetMethod(methodName); return mi.Invoke(obj, args); } catch (Exception ex) { throw new Exception(ex.InnerException.Message, new Exception(ex.InnerException.StackTrace)); } } private static string GetWsClassName(string wsUrl) { string[] parts = wsUrl.Split('/'); string[] pps = parts[parts.Length - 1].Split('.'); return pps[0]; } #endregion // http://blog.csdn.net/lzy_1515
个人的想法就是这样，如果有更好的方法请多多交流。
