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using System;
using System.Collections.Generic; using System.Linq; using System.Text; namespace EformWorkflow { public class ServiceClass { /// <summary> /// 根据指定的信息,调用远程WebService方法 /// </summary> /// <param name="url">WebService和Htt形式的地址</param> /// <param name="namespace">欲调用的WebService的命名空间</param> /// <param name="classname">欲调用的WebService的类名(不包括命名空间前缀)</param> /// <param name="methodname">欲调用的WebService的方法名</param> /// <param name="args">参数列表</param> /// <returns>WebService的执行结果</returns> /// <remarks> /// 如果调用失败,将会抛出Exception。请调用的时候,适当截获异常。 /// 异常信息可能会发生在两个地方: /// 1、动态构造WebService的时候,CompileAssembly失败。 /// 2、WebService本身执行失败。 /// </remarks> /// <example> /// <code> /// object obj = InvokeWebService("http://192.168.2.37/SuperFormWS/WorkFlow/FuctionForFlow.asmx", /// "SuperFormWS.WorkFlow", "FuctionForFlow", "Flow_CommondSignal", new object[]{"1"}); /// </code> /// </example> public static object InvokeWebservice(string url, string @namespace, string classname, string methodname, object[] args) { try { System.Net.WebClient wc = new System.Net.WebClient(); System.IO.Stream stream = wc.OpenRead(url + "?WSDL"); System.Web.Services.Description.ServiceDescription sd = System.Web.Services.Description.ServiceDescription.Read(stream); System.Web.Services.Description.ServiceDescriptionImporter sdi = new System.Web.Services.Description.ServiceDescriptionImporter(); sdi.AddServiceDescription(sd, "", ""); System.CodeDom.CodeNamespace cn = new System.CodeDom.CodeNamespace(@namespace); System.CodeDom.CodeCompileUnit ccu = new System.CodeDom.CodeCompileUnit(); ccu.Namespaces.Add(cn); sdi.Import(cn, ccu); Microsoft.CSharp.CSharpCodeProvider csc = new Microsoft.CSharp.CSharpCodeProvider(); System.CodeDom.Compiler.ICodeCompiler icc = csc.CreateCompiler(); System.CodeDom.Compiler.CompilerParameters cplist = new System.CodeDom.Compiler.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"); System.CodeDom.Compiler.CompilerResults cr = icc.CompileAssemblyFromDom(cplist, ccu); if (true == cr.Errors.HasErrors) { System.Text.StringBuilder sb = new StringBuilder(); foreach (System.CodeDom.Compiler.CompilerError ce in cr.Errors) { sb.Append(ce.ToString()); sb.Append(System.Environment.NewLine); } throw new Exception(sb.ToString()); } 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)); } } } } |
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