带有WCF服务的Silverlight MEF(Silverlight MEF with WCF service)

 我有一个带有许多用户控件的仪表板项目。 本周我创建了一个不仅仅是用户控件的应用程序，并将其集成到我的仪表板应用程序中似乎很痛苦。 所以我搜索了解决方案，发现了MEF和PRISM。 MEF似乎比PRISM容易一些，我开始用本教程做一个Hello World MEF应用程序。 它进展顺利，我成功注入了Hello World xap。 
 
 之后我尝试注入我的实际应用程序并遇到一些问题。 我想指出我解决的问题，因为我可能以错误的方式解决它们，或者它们可能是我当前问题的原因。 
 
 注意：我的应用程序使用支持Silverlight的WCF Web服务来检索数据。 
 
 第一个问题 
 
 在xap包中找不到ServiceReferences.ClientConfig。 我将此文件添加为我的MEF项目客户端的链接。 问题解决了。 
 
 第二个问题 
 
 我在客户端使用一个Settings.xml，它包含端点，如： 
 
<?xml version="1.0" encoding="utf-8" ?>
 <Services>
  <Service Name="MyService">
    <HostPath Name="/ClientBin/MyComponent.xap">
      <Endpoint Url="/MyService.svc"></Endpoint>
    </HostPath>
    <HostPath Name="MyComponent.Web/ClientBin/MyComponent.xap">
      <Endpoint Url="MyComponent.Web/MyService.svc"></Endpoint>
    </HostPath>
  </Service>
</Services>
 
 并阅读此内容以获得具有我的2个功能的WCF Web服务客户端： 
 
public MyServiceClient GetMyServiceClient()
    {
        if (serviceClient == null)
        {
            serviceClient = new MyServiceClient();
            Uri uriEndpointAddress = serviceClient.Endpoint.Address.Uri;
            UriBuilder ub = new UriBuilder(uriEndpointAddress)
            {
                Host = Application.Current.Host.Source.Host,
                Path =
                    GetURLForService("MyService",
                                     Application.Current.Host.Source.AbsolutePath)
            };
            serviceClient.Endpoint.Address = new System.ServiceModel.EndpointAddress(ub.Uri);
        }
        return serviceClient;
    }

private string GetURLForService(string ServiceName, string HostURL)
    {
        string retval = "";
        XDocument doc = XDocument.Load("Settings.xml");
        if (doc.Root != null)
        {
            XElement elmService = doc.Root.Elements("Service").FirstOrDefault(c =>
            {
                XAttribute xAttribute = c.Attribute("Name");
                return xAttribute != null && xAttribute.Value.ToLower() == ServiceName.ToLower();
            });
            if (elmService != null)
            {
                XElement elmHostPath = elmService.Elements("HostPath").FirstOrDefault(c =>
                {
                    XAttribute xAttribute = c.Attribute("Name");
                    return xAttribute != null && xAttribute.Value.ToLower() == HostURL.ToLower();
                });
                if (elmHostPath != null)
                {
                    retval = elmHostPath.Element("Endpoint").Attribute("Url").Value;
                }
            }
        }

        return retval;
    }
 
 我已经将我的Settings.xml文件添加为链接，问题也解决了。 
 
 主要问题 
 
 解决了这两个问题后，我遇到了主要问题。 远程服务器返回错误：NotFound。 
 
 我甚至在我的Settings.xml中尝试过这个： 
 
<HostPath Name="/MEFHubApp/ClientBin/MyComponent.xap">
  <Endpoint Url="/MyComponent.Web/MyService.svc"></Endpoint>
</HostPath>
 
 无论我尝试什么，我的MEF应用都无法找到/使​​用我的网络服务。 
 
 谢谢 

I have a dashboard project with many user controls. This week I've created an application which is more than just a user control and integrating it into my dashboard application seemed like a pain. So I searched for solutions and found MEF and PRISM. MEF seemed a bit easier than PRISM and I started to do a Hello World MEF app with this tutorial. It went well and I injected a Hello World xap successfully.
 
After that I tried to inject my real application and encountered some problems. I want to point out problems that I solved because I might solved them in a wrong way or they may be the reason of my current problem.
 
Note: My application uses a Silverlight enabled WCF Web Service to retrieve data.
 
First Problem
 
ServiceReferences.ClientConfig was not found in xap package. I added this file as link to my MEF project client side. Problem solved.
 
Second Problem
 
I am using a Settings.xml on my client side which holds the endpoints like:
 
<?xml version="1.0" encoding="utf-8" ?>
 <Services>
  <Service Name="MyService">
    <HostPath Name="/ClientBin/MyComponent.xap">
      <Endpoint Url="/MyService.svc"></Endpoint>
    </HostPath>
    <HostPath Name="MyComponent.Web/ClientBin/MyComponent.xap">
      <Endpoint Url="MyComponent.Web/MyService.svc"></Endpoint>
    </HostPath>
  </Service>
</Services>
 
and read this to get WCF Web Service service client with my 2 functions which are:
 
public MyServiceClient GetMyServiceClient()
    {
        if (serviceClient == null)
        {
            serviceClient = new MyServiceClient();
            Uri uriEndpointAddress = serviceClient.Endpoint.Address.Uri;
            UriBuilder ub = new UriBuilder(uriEndpointAddress)
            {
                Host = Application.Current.Host.Source.Host,
                Path =
                    GetURLForService("MyService",
                                     Application.Current.Host.Source.AbsolutePath)
            };
            serviceClient.Endpoint.Address = new System.ServiceModel.EndpointAddress(ub.Uri);
        }
        return serviceClient;
    }

private string GetURLForService(string ServiceName, string HostURL)
    {
        string retval = "";
        XDocument doc = XDocument.Load("Settings.xml");
        if (doc.Root != null)
        {
            XElement elmService = doc.Root.Elements("Service").FirstOrDefault(c =>
            {
                XAttribute xAttribute = c.Attribute("Name");
                return xAttribute != null && xAttribute.Value.ToLower() == ServiceName.ToLower();
            });
            if (elmService != null)
            {
                XElement elmHostPath = elmService.Elements("HostPath").FirstOrDefault(c =>
                {
                    XAttribute xAttribute = c.Attribute("Name");
                    return xAttribute != null && xAttribute.Value.ToLower() == HostURL.ToLower();
                });
                if (elmHostPath != null)
                {
                    retval = elmHostPath.Element("Endpoint").Attribute("Url").Value;
                }
            }
        }

        return retval;
    }
 
I've added my Settings.xml file as link also and problem solved.
 
Main Problem
 
After solving these two problems, I've encountered main problem. The remote server returned an error: NotFound.
 
I even tried this in my Settings.xml:
 
<HostPath Name="/MEFHubApp/ClientBin/MyComponent.xap">
  <Endpoint Url="/MyComponent.Web/MyService.svc"></Endpoint>
</HostPath>
 
My MEF app can't find/use my web service no matter what I try.
 
Thanks

原文：https://stackoverflow.com/questions/16455913