“System.InvalidOperationException” 当 LINQ to SQL 在 WP8 上使用 W

这是发生异常的代码：

public Listado()
    {
        InitializeComponent();
        ListadoWebService();
    }
    public void ListadoWebService()
    {
       // InitializeComponent();
        ServiceTours.ServiceToursClient cl = new ServiceTours.ServiceToursClient(); 
        cl.ListadoCompleted += new EventHandler<ListadoCompletedEventArgs>(Listado2);
        cl.ListadoAsync();
    }
    private void Listado2(object sender, ListadoCompletedEventArgs e)
    {
        listB.ItemsSource = e.Result; // listB is ListBox in WP8
    }

我得到以下异常：

An exception of type 'System.InvalidOperationException' occurred in System.ServiceModel.ni.dll but was not handled in user code

我想说的是，我直接在MSDN上遵循了本教程

因此，最终的服务参考网址是：http://IP/WcfTours/ServiceTours.svc，因为它应该是。//99.99.99 代表 IP

Allow an app through Windows Firewall World Wide Web Services (HTTP)允许domain public和private。

Virtual Directory已创建。

有人可以帮我设置endpoint吗？

异常消息：

{System.InvalidOperationException: An endpoint configuration section for contract 'ServiceTours.IServiceTours' could not be loaded because more than one endpoint configuration for that contract was found. Please indicate the preferred endpoint configuration section by name. at System.ServiceModel.Description.ConfigLoader.LookupChannel(String configurationName, String contractName, Boolean wildcard) at System.ServiceModel.Description.ConfigLoader.LoadChannelBehaviors(ServiceEndpoint serviceEndpoint, String configurationName) at System.ServiceModel.ChannelFactory.ApplyConfiguration(String configurationName) at System.ServiceModel.ChannelFactory.InitializeEndpoint(String configurationName, EndpointAddress address) at System.ServiceModel.ChannelFactory 1..ctor（字符串端点配置名称，端点地址远程地址） at System.ServiceModel.EndpointTrait 1.CreateSimplexFactory() at System.ServiceModel.ClientBase 1.CreateChannelFactoryRef（EndpointTrait 1 endpointTrait) at System.ServiceModel.ClientBase 1.InitializeChannelFactoryRef（） at System.ServiceModel.ClientBase 1..ctor() at PhoneApp1.ServiceTours.ServiceToursClient..ctor() at PhoneApp1.Listado.ListadoWebService() at PhoneApp1.Listado..ctor()}