动态调用WebService以及传递复杂对象
1.动态调用WebService?
解决方案:添加动态调用WebService类WebServiceHelper;代码如下:
using System.Collections.Generic; using System.Web; using System.Net; using System.Web.Services.Description; using System.Text; using System.IO; using System.CodeDom; using Microsoft.CSharp; using System.CodeDom.Compiler; /// <summary> ///WebServiceHelper 的摘要说明 /// </summary> public class WebServiceHelper { public WebServiceHelper() { // //TODO: 在此处添加构造函数逻辑 // } #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 }
2.调用WebService时,传入参数为Entity[](即实体集合等复杂对象),如何传入以及接收参数?
解决方案:第一步序列化对象
XmlSerializer xs = new XmlSerializer(typeof(Entity[])); MemoryStream mstream = new MemoryStream(); XmlTextWriter writer = new XmlTextWriter(mstream, Encoding.Default); xs.Serialize(mstream, en); writer.Close(); string str = Encoding.UTF8.GetString(mstream.ToArray()); #endregion #region 写入文件再读取出字符串 //FileStream fs = new FileStream("c:\\aaa.txt", FileMode.OpenOrCreate); //xs = new XmlSerializer(typeof(Entity[])); //xs.Serialize(fs, en); //fs.Close(); //fs = new FileStream("c:\\aaa.txt", FileMode.Open, FileAccess.Read); //StreamReader reader = new StreamReader(fs, Encoding.Default); //str = reader.ReadToEnd(); //reader.Close(); //reader.Dispose(); //fs.Close(); //fs.Dispose(); #endregion
第二步:动态调用WebService
代码 Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> string url = "http://localhost:4494/SMWebService/WebService_S.asmx"; object[] args = new object[2]; args[0] = mapname; args[1] = str; object result = WebServiceHelper.InvokeWebService(url, "AddEntity", args);
第三步:WebService中的处理过程(反序列化)
[WebMethod] public bool AddEntity(string mapname,string strentites) { Stream stream = new MemoryStream(ASCIIEncoding.Default.GetBytes(strentites)); XmlSerializer xml = new XmlSerializer(typeof(Entity[])); Entity[] entities = (Entity[])xml.Deserialize(stream); }