using System; using System.ComponentModel; using System.Web.Services; using System.Web.Services.Protocols; using System.IO; using System.Net; using System.CodeDom; using System.CodeDom.Compiler; using System.Web.Services.Description; using System.Xml.Serialization; using System.Web.Services.Discovery; using System.Xml.Schema; using System.Text; using System.Security.Cryptography; using System.Reflection; /// <summary> /// WebServiceProxy 的摘要说明 /// </summary> [WebService(Namespace = "http://tempuri.org/")] [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)] [ToolboxItem(false)] // 若要允许使用 ASP.NET AJAX 从脚本中调用此 Web 服务，请取消对下行的注释。 // [System.Web.Script.Services.ScriptService] public class WebServiceProxy : System.Web.Services.WebService { #region 私有变量和属性定义 /// <summary> /// web服务地址 /// </summary> private string _wsdlUrl = string.Empty; /// <summary> /// web服务名称 /// </summary> private string _wsdlName = string.Empty; /// <summary> /// 代理类命名空间 /// </summary> private string _wsdlNamespace = "FrameWork.WebService.DynamicWebServiceCalling.{0}"; /// <summary> /// 代理类类型名称 /// </summary> private Type _typeName = null; /// <summary> /// 程序集名称 /// </summary> private string _assName = string.Empty; /// <summary> /// 代理类所在程序集路径 /// </summary> private string _assPath = string.Empty; /// <summary> /// 代理类的实例 /// </summary> private object _instance = null; /// <summary> /// 代理类的实例 /// </summary> private object Instance { get { if (_instance == null) { _instance = Activator.CreateInstance(_typeName); return _instance; } else return _instance; } } #endregion #region 构造函数 public WebServiceProxy(string wsdlUrl) { this._wsdlUrl = wsdlUrl; string wsdlName = WebServiceProxy.getWsclassName(wsdlUrl); this._wsdlName = wsdlName; this._assName = string.Format(_wsdlNamespace, wsdlName); this._assPath = Path.GetTempPath() + this._assName + getMd5Sum(this._wsdlUrl) + ".dll"; this.CreateServiceAssembly(); } public WebServiceProxy(string wsdlUrl, string wsdlName) { this._wsdlUrl = wsdlUrl; this._wsdlName = wsdlName; this._assName = string.Format(_wsdlNamespace, wsdlName); this._assPath = Path.GetTempPath() + this._assName + getMd5Sum(this._wsdlUrl) + ".dll"; this.CreateServiceAssembly(); } #endregion #region 得到WSDL信息，生成本地代理类并编译为DLL，构造函数调用，类生成时加载 /// <summary> /// 得到WSDL信息，生成本地代理类并编译为DLL /// </summary> private void CreateServiceAssembly() { if (this.checkCache()) { this.initTypeName(); return; } if (string.IsNullOrEmpty(this._wsdlUrl)) { return; } try { //使用WebClient下载WSDL信息 WebClient web = new WebClient(); Stream stream = web.OpenRead(this._wsdlUrl); ServiceDescription description = ServiceDescription.Read(stream);//创建和格式化WSDL文档 ServiceDescriptionImporter importer = new ServiceDescriptionImporter();//创建客户端代理代理类 importer.ProtocolName = "Soap"; importer.Style = ServiceDescriptionImportStyle.Client; //生成客户端代理 importer.CodeGenerationOptions = CodeGenerationOptions.GenerateProperties | CodeGenerationOptions.GenerateNewAsync; importer.AddServiceDescription(description, null, null);//添加WSDL文档 //使用CodeDom编译客户端代理类 CodeNamespace nmspace = new CodeNamespace(_assName); //为代理类添加命名空间 CodeCompileUnit unit = new CodeCompileUnit(); unit.Namespaces.Add(nmspace); this.checkForImports(this._wsdlUrl, importer); ServiceDescriptionImportWarnings warning = importer.Import(nmspace, unit); CodeDomProvider provider = CodeDomProvider.CreateProvider("CSharp"); CompilerParameters parameter = new CompilerParameters(); parameter.ReferencedAssemblies.Add("System.dll"); parameter.ReferencedAssemblies.Add("System.XML.dll"); parameter.ReferencedAssemblies.Add("System.Web.Services.dll"); parameter.ReferencedAssemblies.Add("System.Data.dll"); parameter.GenerateExecutable = false; parameter.GenerateInMemory = false; parameter.IncludeDebugInformation = false; CompilerResults result = provider.CompileAssemblyFromDom(parameter, unit); provider.Dispose(); if (result.Errors.HasErrors) { string errors = string.Format(@"编译错误:{0}错误！", result.Errors.Count); foreach (CompilerError error in result.Errors) { errors += error.ErrorText; } throw new Exception(errors); } this.copyTempAssembly(result.PathToAssembly); this.initTypeName(); } catch (Exception e) { throw new Exception(e.Message); } } #endregion #region 执行Web服务方法 /// <summary> /// 执行代理类指定方法，有返回值 /// </summary> /// <param name="methodName">方法名称</param> /// <param name="param">参数</param> /// <returns>object</returns> public object ExecuteQuery(string methodName, object[] param) { object rtnObj = null; try { if (this._typeName == null) { //记录Web服务访问类名错误日志代码位置 throw new TypeLoadException("Web服务访问类名[" + this._wsdlName + "]不正确，请检查！"); } //调用方法 MethodInfo mi = this._typeName.GetMethod(methodName); if (mi == null) { //记录Web服务方法名错误日志代码位置 throw new TypeLoadException("Web服务访问方法名[" + methodName + "]不正确，请检查！"); } try { if (param == null) rtnObj = mi.Invoke(Instance, null); else { rtnObj = mi.Invoke(Instance, param); //rtnObj = mi.Invoke(Instance, new object[] { param }); } } catch (TypeLoadException tle) { //记录Web服务方法参数个数错误日志代码位置 throw new TypeLoadException("Web服务访问方法【" + methodName + "】参数个数不正确，请检查！", new TypeLoadException(tle.StackTrace)); } } catch (Exception ex) { throw new Exception(ex.Message, new Exception(ex.StackTrace)); } return rtnObj; } /// <summary> /// 执行代理类指定方法，无返回值 /// </summary> /// <param name="methodName">方法名称</param> /// <param name="param">参数</param> public void ExecuteNoQuery(string methodName, object[] param) { try { if (this._typeName == null) { //记录Web服务访问类名错误日志代码位置 throw new TypeLoadException("Web服务访问类名[" + this._wsdlName + "]不正确，请检查！"); } //调用方法 MethodInfo mi = this._typeName.GetMethod(methodName); if (mi == null) { //记录Web服务方法名错误日志代码位置 throw new TypeLoadException("Web服务访问方法名[" + methodName + "]不正确，请检查！"); } try { if (param == null) mi.Invoke(Instance, null); else mi.Invoke(Instance, param); } catch (TypeLoadException tle) { //记录Web服务方法参数个数错误日志代码位置 throw new TypeLoadException("Web服务访问方法[" + methodName + "]参数个数不正确，请检查！", new TypeLoadException(tle.StackTrace)); } } catch (Exception ex) { throw new Exception(ex.Message, new Exception(ex.StackTrace)); } } #endregion #region 私有方法 /// <summary> /// 得到代理类类型名称 /// </summary> private void initTypeName() { Assembly serviceAsm = Assembly.LoadFrom(this._assPath); Type[] types = serviceAsm.GetTypes(); string objTypeName = ""; foreach (Type t in types) { if (t.BaseType == typeof(SoapHttpClientProtocol)) { objTypeName = t.Name; break; } } _typeName = serviceAsm.GetType(this._assName + "." + objTypeName); } /// <summary> /// 根据web service文档架构向代理类添加ServiceDescription和XmlSchema /// </summary> /// <param name="baseWSDLUrl">web服务地址</param> /// <param name="importer">代理类</param> private void checkForImports(string baseWsdlUrl, ServiceDescriptionImporter importer) { DiscoveryClientProtocol dcp = new DiscoveryClientProtocol(); dcp.DiscoverAny(baseWsdlUrl); dcp.ResolveAll(); foreach (object osd in dcp.Documents.Values) { if (osd is ServiceDescription) importer.AddServiceDescription((ServiceDescription)osd, null, null); ; if (osd is XmlSchema) importer.Schemas.Add((XmlSchema)osd); } } /// <summary> /// 复制程序集到指定路径 /// </summary> /// <param name="pathToAssembly">程序集路径</param> private void copyTempAssembly(string pathToAssembly) { File.Copy(pathToAssembly, this._assPath); } private string getMd5Sum(string str) { Encoder enc = System.Text.Encoding.Unicode.GetEncoder(); byte[] unicodeText = new byte[str.Length * 2]; enc.GetBytes(str.ToCharArray(), 0, str.Length, unicodeText, 0, true); MD5 md5 = new MD5CryptoServiceProvider(); byte[] result = md5.ComputeHash(unicodeText); StringBuilder sb = new StringBuilder(); for (int i = 0; i < result.Length; i++) { sb.Append(result[i].ToString("X2")); } return sb.ToString(); } /// <summary> /// 是否已经存在该程序集 /// </summary> /// <returns>false:不存在该程序集,true:已经存在该程序集</returns> private bool checkCache() { if (File.Exists(this._assPath)) { return true; } return false; } //私有方法，默认取url入口的文件名为类名 private static string getWsclassName(string wsdlUrl) { string[] parts = wsdlUrl.Split('/'); string[] pps = parts[parts.Length - 1].Split('.'); return pps[0]; } #endregion }