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说了这么多,实际上我们要实现这样的功能:
public static object InvokeWebService(string url, string methodname, object[] args)
其中,url是Web服务的地址,methodname是要调用服务方法名,args是要调用Web服务所需的参数,返回值就是web服务返回的结果了。
#region InvokeWebService
//动态调用web服务 public static object InvokeWebService(string url, string methodname, object[] args) { return WebServiceHelper.InvokeWebService(url ,null ,methodname ,args) ; } public static object InvokeWebService(string url, string classname, string methodname, object[] args) { string @namespace = "EnterpriseServerBase.WebService.DynamicWebCalling" ; if((classname == null) ||(classname == "")) { classname = WebServiceHelper.GetWsClassName(url) ; } try { //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); object obj = Activator.CreateInstance(t); System.Reflection.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
string url = "http://www.webservicex.net/globalweather.asmx" ;
string[] args = new string[2] ; args[0] = this.textBox_CityName.Text ; args[1] = "China" ; object result = WebServiceHelper.InvokeWebService(url ,"GetWeather" ,args) ; this.label_Result.Text = result.ToString() ;
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