WCF跨域 客户端无法访问

尝试向 URI“http://localhost:8554/CustomerManage.svc”发出请求时出错。这可能是由于试图以跨域方式访问服务而又没有正确的跨域策略，或策略不适用于 SOAP 服务。您可能需要与该服务的所有者联系，以发布跨域策略文件并确保该文件允许发送 SOAP 相关的 HTTP 标头。出现此错误也可能是由于使用的是 Web 服务代理中的内部类型而没有使用 InternalsVisibleToAttribute 属性。有关详细信息，请参阅内部异常。

刚开始我以为是把服务写错了。。但是服务在WPF程序中是可以调用的。。在Silverlight调用确发生错误。。

在Silverlight错误的原因可能是：在默认情况下只允许源站点通信。

在WCF服务那边放两个文件：

只需要在你的*.Web服务端的根目录下放上两个文件clientaccesspolicy.xml 和crossdomain.xml

XML文件：

<?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"/>
      </grant-to>
    </policy>
  </cross-domain-access>
</access-policy>

<?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="*" /> 
<allow-http-request-headers-from domain="*" headers="*" /> 
</cross-domain-policy> 

我这边的实例：
WCF服务：

namespace WCFDemo
{
    //服务契约
    [ServiceContract]
    public interface ICustomerManage
    {
        [OperationContract]
        string GetData(int value);

        [OperationContract]
        List<CustomerInfo> GetAllCustomer();

    }

    //数据契约
    [DataContract]
    public class CustomerInfo
    {
        [DataMember(Order = 1)]
        public string CustomerID { get; set; }
        [DataMember(Order = 2)]
        public string CustomerName { get; set; }
        [DataMember(Order = 3)]
        public string CustomerPhone { get; set; }
        [DataMember(Order = 4)]
        public string CustomerAddress { get; set; }
    }
}

namespace WCFDemo
{
    // 
    public class CustomerManage : ICustomerManage
    {
        public string GetData(int value)
        {
            return string.Format("You entered: {0}", value);
        }

        public List<CustomerInfo> GetAllCustomer()
        {
          return new List<CustomerInfo>()
              {
                  new CustomerInfo(){CustomerAddress = "四川成都高新区",CustomerID = "00001",CustomerName = "唐纳德",CustomerPhone = "454d7782112"},
                  new CustomerInfo(){CustomerAddress = "四川成都高新区",CustomerID = "00002",CustomerName = "高峰期",CustomerPhone = "454d7782112"},
                  new CustomerInfo(){CustomerAddress = "四川成都高新区",CustomerID = "00003",CustomerName = "力保",CustomerPhone = "454d7782112"}
              };
        }
    }
}

Silverlight客户端：

<controls:ChildWindow x:Class="SLMvvmDemo2.Views.ChildWindow1"
           xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
           xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
           xmlns:controls="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls"
           Width="622" Height="291"  Style="{StaticResource ChildWindowStyle}"
           Title="Silverlight 调用WCF " xmlns:sdk="http://schemas.microsoft.com/winfx/2006/xaml/presentation/sdk">
    <Grid x:Name="LayoutRoot" Margin="2">
        <Grid.RowDefinitions>
            <RowDefinition />
            <RowDefinition Height="Auto" />
        </Grid.RowDefinitions>

        <Button x:Name="CancelButton" Content="取消" Click="CancelButton_Click" Width="75" Height="28" HorizontalAlignment="Right" Margin="0,12,0,0" Grid.Row="1" />
        <Button x:Name="OKButton" Content="确定" Click="OKButton_Click" Width="75" Height="28" HorizontalAlignment="Right" Margin="0,12,79,0" Grid.Row="1" />
        <sdk:DataGrid  Name="dataGrid1"  />
    </Grid>
</controls:ChildWindow>

 public partial class ChildWindow1 : ChildWindow
    {
        public ChildWindow1()
        {
            InitializeComponent();
            this.Loaded += new RoutedEventHandler(ChildWindow1_Loaded);
        }

        void ChildWindow1_Loaded(object sender, RoutedEventArgs e)
        {
            CustomerManageClient customer =new CustomerManageClient();

            customer.GetAllCustomerCompleted += customer_GetAllCustomerCompleted;
            customer.GetAllCustomerAsync();

        }

        void customer_GetAllCustomerCompleted(object sender, GetAllCustomerCompletedEventArgs e)
        {
            List<CustomerInfo> list = e.Result.ToList();
            dataGrid1.ItemsSource = list;
        }

        private void OKButton_Click(object sender, RoutedEventArgs e)
        {
            this.DialogResult = true;
        }

        private void CancelButton_Click(object sender, RoutedEventArgs e)
        {
            this.DialogResult = false;
        }
    }

WebConfig：

<configuration>
    <system.serviceModel>
        <bindings>
            <basicHttpBinding>
                <binding name="BasicHttpBinding_ICustomerManage" maxBufferSize="2147483647"
                    maxReceivedMessageSize="2147483647">
                    <security mode="None" />
                </binding>
            </basicHttpBinding>
        </bindings>
        <client>
            <endpoint address="http://localhost:8554/CustomerManage.svc"
                binding="basicHttpBinding" bindingConfiguration="BasicHttpBinding_ICustomerManage"
                contract="CustomerService.ICustomerManage" name="BasicHttpBinding_ICustomerManage" />
        </client>
    </system.serviceModel>
</configuration>