这真的可以节省我很多时间.我不需要维护两个完全相同的应用程序,每次进行更改时我都不需要部署到数百个信息亭.
我这样做的确如此.我在WPF主机中托管了一个Silverlight应用程序.我使用自托管WCF来提供双工网络tcp服务.要做到这一点,你还必须有一个HTTP托管的clientaccesspolicy.xml,我也可以从同一个服务中自托管.
我希望我能解释得足以让球滚动.我将尽可能包含一些样本,但由于该项目,我无法分享所有内容.
首先,一些考虑因素：
1)netlight在Silverlight和WPF之间不安全,因为Silverlight(从版本4开始 – 仅测试版本5)无法进行安全连接,因此如果要使用此连接,则必须使用自己的加密.
2)有两种方法可以进行双工WCF,一种是使用HTTP. HTTP方法“轮询”服务以查看是否有任何命令来自客户端的主机.这固有地使它比net tcp慢得多.另一个是net tcp(如前所述).只有http方法支持开箱即用的加密.
3)当您在WPF主机中托管Silverlight应用程序时,当您开始调试时,您将无法调试Silverlight应用程序,因为调试器将无法连接到(如它所见)外部Silverlight应用程序,只有WPF.要解决此问题,您必须在启动WPF主机时“激活”Silverlight应用程序的附件.
现在代码：
远程服务接口：
using System.ServiceModel; namespace RemoteService { [ServiceContract(CallbackContract = typeof(IRemoteCallbackService))] public interface IRemoteService { [OperationContract] void TestCallback(); // Todo: Add your service operations here } [ServiceContract] public interface IRemoteCallbackService { [OperationContract(IsOneWay = true)] void OnTestCallbackComplete(); // Todo: Add your service operations here } }
您的策略侦听器界面：
using System.IO; using System.ServiceModel; using System.ServiceModel.Web; namespace RemoteService { [ServiceContract] public interface IPolicyRetriever { [OperationContract,WebGet(UriTemplate = "/clientaccesspolicy.xml")] Stream GetSilverlightPolicy(); [OperationContract,WebGet(UriTemplate = "/crossdomain.xml")] Stream GetFlashPolicy(); } }
实际的服务实现：
using System.Text; namespace RemoteService { public class RemoteService : IRemoteService,IPolicyRetriever { IRemoteCallbackService client = null; public void TestCallback() { client = OperationContext.Current.GetCallbackChannel<IRemoteCallbackService>(); client.OnTestCallbackComplete(); } #region Cross Domain Policy Implementation private Stream StringToStream(string result) { WebOperationContext.Current.OutgoingResponse.ContentType = "application/xml"; return new MemoryStream(Encoding.UTF8.GetBytes(result)); } //<grant-to> //<resource path="/" include-subpaths="true"/> //<socket-resource port="4502-4534" protocol="tcp" /> //</grant-to> Stream IPolicyRetriever.GetSilverlightPolicy() { string result = @"<?xml version=""1.0"" encoding=""utf-8""?><access-policy><cross-domain-access><policy><allow-from http-request-headers=""*""><domain uri=""*""/></allow-from><grant-to><resource path=""/"" include-subpaths=""true""/><socket-resource port=""4502-4534"" protocol=""tcp"" /></grant-to></policy></cross-domain-access></access-policy>"; return StringToStream(result); } Stream IPolicyRetriever.GetFlashPolicy() { string result = @"<?xml version=""1.0""?><!DOCTYPE cross-domain-policy SYstem ""http://www.macromedia.com/xml/dtds/cross-domain-policy.dtd""><cross-domain-policy><allow-access-from domain=""*"" /></cross-domain-policy>"; return StringToStream(result); } #endregion Cross Domain Policy Implementation } }
上面应该在一个dll项目中的单独的类中,然后由WPF主机引用.
并在控制台应用程序中托管它(您需要将其转换为WPF)：
using System; using System.ServiceModel; using System.ServiceModel.Description; using LocalService; using RemoteService; namespace Host { internal class Program { /// <summary> /// Main host entry point,this starts our listeners /// </summary> /// <param name="args">The args.</param> private static void Main(string[] args) { // Start our listeners StartListeners(80,4504,true); } /// <summary> /// Starts the listeners. /// </summary> private static void StartListeners(int HttpPort = 80,int NetTcpPort = 4504,bool StartRemoteService = true) { Console.WriteLine("Starting Policy Listener"); string policyaddress = "http://" + Environment.MachineName + ":" + HttpPort.ToString(); string locallistener = "net.tcp://" + Environment.MachineName + ":" + NetTcpPort.ToString(); // Start our policy listener and (if required) our remote http service: using (System.ServiceModel.ServiceHost policyandremoteservicehost = new System.ServiceModel.ServiceHost(typeof(RemoteService.RemoteService),new Uri(policyaddress))) { policyandremoteservicehost.AddServiceEndpoint(typeof(IPolicyRetriever),new System.ServiceModel.WebHttpBinding(),"").Behaviors.Add(new WebHttpBehavior()); // if we are to start our remote service here too,then add that endpoint in: if (StartRemoteService) { policyandremoteservicehost.AddServiceEndpoint(typeof(IRemoteService),new System.ServiceModel.PollingDuplexHttpBinding(),"RemoteService"); } ServiceMetadataBehavior psmb = new ServiceMetadataBehavior(); psmb.HttpGetEnabled = true; psmb.MetadataExporter.PolicyVersion = PolicyVersion.Policy15; policyandremoteservicehost.Description.Behaviors.Add(psmb); policyandremoteservicehost.open(); Console.WriteLine("WCF Host Running..."); Console.WriteLine("Press <enter> to shutdown"); Console.ReadLine(); Console.WriteLine("Closing connections,please wait"); policyandremoteservicehost.Close(); Console.WriteLine("Closed policy and remote services"); } } } }
哪个应该给你一些工作. startremoteservice bool可用于使其成为策略文件侦听器,然后允许您连接到远程服务,而远程服务不必托管策略文件.
请记住,Silverlight只能连接到HTTP / HTTPS端口,以及4502-4534范围内的TCP端口.包含的clientaccesspolicy.xml非常不受限制.
我希望这对某人有用:).
如果你愿意,请随时问我问题,我会留意一下.
有几点需要注意：您可以从此解决方案中为托管的xap提供服务,因此不需要IIS.您还可以从浏览器中运行Silverlight xap并仍然使用这些服务.
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