Silverlight 应用程序无法访问其他机器上的 WCF 服务 [英] Silverlight application cannot access WCF services on other machines

问题描述

我有一个运行良好的 Silverlight 应用程序，可以访问在 Silverlight 应用程序本身中托管的 WCF 服务.它使用的端口是 1794.

I have a silverlight application which works perfectly and can access the WCF services which are hosted in silverlight application itself. The port it is using is 1794.

当我部署到其他服务器(开发或测试或暂存)时，应用程序无法访问 WCF 服务.

When I deploy to other servers (dev or test or staging), the application is not able to access WCF services.

这是我的 ServiceReference.ClientConfig 中的一个片段

This is a snippet from my ServiceReference.ClientConfig looks like

<endpoint address="http://localhost:1794/MyWebService.svc"
                binding="customBinding" bindingConfiguration="CustomBinding_MyWebService"
                contract="ConfigMgmtServiceReference.MyWebService"
                name="CustomBinding_MyWebService" />

我的根文件夹也包含 clientaccesspolicy.xml 文件.

My root folder contains the clientaccesspolicy.xml file too.

我怎样才能解决这个问题?

How can I get past this issue?

推荐答案

我怀疑 localhost:1794 会导致这个问题 - 当 Silverlight 应用程序在客户端机器上执行时，本地主机将无法获得它返回到服务器.

I suspect the localhost:1794 would be causing the issue - when the silverlight application executes on a client machine the localhost will not get it back to the server.

我用来消除此类问题的技术是在运行时以编程方式设置端点.我需要的两条信息是服务在我的网络项目中的位置(提前知道)，以及为 Silverlight 应用程序提供服务的地址(域)(我可以找到).

The technique i use to eliminate issues like this is to programmatically set the end points at run time. The two pieces of info i need are the location within my web project of the service (which is known ahead of time), and the address (domain) that the silverlight app has been served from (which i can find out).

    private void initEndpoint(ServiceEndpoint endPoint, string serviceName)
    {
        Uri hostUri = Application.Current.Host.Source;
        string wcfBaseUri = string.Format("{0}://{1}:{2}/WebServices/", hostUri.Scheme, hostUri.Host, hostUri.Port);

        endPoint.Address = new EndpointAddress(new Uri(wcfBaseUri + serviceName));
    }

在这段代码中，文件夹 /WebServices 是我的 Web 服务在我的 Web 应用程序中所在的位置.然后我像这样调用函数:

In this piece of code, the folder /WebServices is where my web services are located within my web app. I then call the function like this:

        LoggingServiceClient loggingService = new LoggingServiceClient();
        initEndpoint(loggingService.Endpoint, "LoggingService.svc");

我的实际设置比这稍微复杂一些，因为我也希望能够覆盖它并手动配置端点，但您明白了.通过这样做，我已经能够部署到各种设置，网络服务器在奇怪的端口上运行，并且 Silverlight->webservice 位每次都可以正常工作.

my actual setup is slightly more complex than that, because i also want to be able to override that and manually configure the end points, but you get the point. By doing this, i have been able to deploy to all sorts of setups, with webservers running on odd ports, and the silverlight->webservice bit just works every time.

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