Question

我创建了一个解决方案，然后添加了一个包含所有WCF服务的项目。然后我在同一个解决方案中添加了对Silverlight项目的引用。现在，当我尝试调试时，我得到一个消息框说This Silverlight project you are about to debug is consuming web services. Calls to the web service will fail unless the project is executed in the context of the web which contains the web service.，但如果我运行它，我会收到此错误： -

An error occurred while trying to make a request to URI 'http://localhost:50318/CustomersService.svc'. This could be due to attempting to access a service in a cross-domain way without a proper cross-domain policy in place, or a policy that is unsuitable for SOAP services. You may need to contact the owner of the service to publish a cross-domain policy file and to ensure it allows SOAP-related HTTP headers to be sent. This error may also be caused by using internal types in the web service proxy without using the InternalsVisibleToAttribute attribute. Please see the inner exception for more details.

这是一个详细的例外： -

{System.ServiceModel.CommunicationException: An error occurred while trying to make a request to URI 'http://localhost:50318/CustomersService.svc'. This could be due to attempting to access a service in a cross-domain way without a proper cross-domain policy in place, or a policy that is unsuitable for SOAP services. You may need to contact the owner of the service to publish a cross-domain policy file and to ensure it allows SOAP-related HTTP headers to be sent. This error may also be caused by using internal types in the web service proxy without using the InternalsVisibleToAttribute attribute. Please see the inner exception for more details. ---> System.Security.SecurityException ---> System.Security.SecurityException: Security error.
   at System.Net.Browser.BrowserHttpWebRequest.InternalEndGetResponse(IAsyncResult asyncResult)
   at System.Net.Browser.BrowserHttpWebRequest.<>c__DisplayClass5.<EndGetResponse>b__4(Object sendState)
   at System.Net.Browser.AsyncHelper.<>c__DisplayClass2.<BeginOnUI>b__0(Object sendState)
   --- End of inner exception stack trace ---
   at System.Net.Browser.AsyncHelper.BeginOnUI(SendOrPostCallback beginMethod, Object state)
   at System.Net.Browser.BrowserHttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
   at System.ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.HttpChannelAsyncRequest.CompleteGetResponse(IAsyncResult result)
   --- End of inner exception stack trace ---
   at System.ServiceModel.AsyncResult.End[TAsyncResult](IAsyncResult result)
   at System.ServiceModel.Channels.ServiceChannel.EndCall(String action, Object[] outs, IAsyncResult result)
   at System.ServiceModel.ClientBase`1.ChannelBase`1.EndInvoke(String methodName, Object[] args, IAsyncResult result)
   at MVVMDemo.CustomersServiceRef.CustomersServiceClient.CustomersServiceClientChannel.EndGetCustomers(IAsyncResult result)
   at MVVMDemo.CustomersServiceRef.CustomersServiceClient.MVVMDemo.CustomersServiceRef.ICustomersService.EndGetCustomers(IAsyncResult result)
   at MVVMDemo.CustomersServiceRef.CustomersServiceClient.OnEndGetCustomers(IAsyncResult result)
   at System.ServiceModel.ClientBase`1.OnAsyncCallCompleted(IAsyncResult result)}

我该怎么办？

提前致谢：）

Answer 1

如果您托管Silverlight控件的网页和您尝试连接的网络服务位于不同的域中（在您看来它们看起来是不同的项目），则需要添加 clientaccesspolicy.xml 提交到您的网站。

<?xml version="1.0" encoding="utf-8"?>
<access-policy>
  <cross-domain-access>
    <policy>
      <allow-from http-request-headers="SOAPAction">
        <domain uri="*"/>
      </allow-from>
      <grant-to>
        <resource path="/" include-subpaths="true"/>
      </grant-to>
    </policy>
  </cross-domain-access>
</access-policy>

查看此link了解详情

CommunicationException未被用户代码处理

1 个答案: