为什么WCF服务将PropertyChanged值返回给Silverlight应用程序？

Question

我有一个Silverlight 4应用程序，它通过WCF Web服务检索数据。 WCF Web服务从.Net XML Web服务中提取数据。 XML Web Service在其他项目中使用时工作正常。应用程序能够直接检索数据，直到一些更改开始抛出此错误：

类型'System.ComponentModel.PropertyChangedEventHandler'无法序列化。请考虑使用DataContractAttribute属性对其进行标记，并使用DataMemberAttribute属性标记要序列化的所有成员。或者，您可以确保类型是公共的并且具有无参数构造函数 - 然后将序列化该类型的所有公共成员，并且不需要任何属性。

我没有用INotifyPropertyChanged标记任何内容或......更改。

我在托管Web应用程序项目中创建了一个测试网页，数据返回时没有错误。我可以单步执行WCF服务，看看数据是否已正确检索。

这是调用代码：

private void LoadJob()
{
    this.busyIndicator.BusyContent = "Loading job...";
    this.busyIndicator.IsBusy = true;
    var client = new BOMViewerServiceReference.BOMViewerServiceClient();
    client.GetJobCompleted += new EventHandler<BOMViewerServiceReference.GetJobCompletedEventArgs>(client_GetJobCompleted);
    client.GetJobAsync(this.jobNumberTextBox.Text.Trim());
}

void client_GetJobCompleted(object sender, BOMViewerServiceReference.GetJobCompletedEventArgs e)
{
    if (e.Error != null)
    {
        this.busyIndicator.BusyContent = "Busy...";
        this.busyIndicator.IsBusy = false;
        MessageBox.Show(e.Error.ToString());
        return;
    }
    //Load your data here and assign the result to the CollectionViewSource.
    var partViewSource = (CollectionViewSource)this.Resources["jobHeadViewSource"];
    partViewSource.Source = e.Result;
    this.busyIndicator.BusyContent = "Busy...";
    this.busyIndicator.IsBusy = false;
}

private void LoadJob() { this.busyIndicator.BusyContent = "Loading job..."; this.busyIndicator.IsBusy = true; var client = new BOMViewerServiceReference.BOMViewerServiceClient(); client.GetJobCompleted += new EventHandler<BOMViewerServiceReference.GetJobCompletedEventArgs>(client_GetJobCompleted); client.GetJobAsync(this.jobNumberTextBox.Text.Trim()); } void client_GetJobCompleted(object sender, BOMViewerServiceReference.GetJobCompletedEventArgs e) { if (e.Error != null) { this.busyIndicator.BusyContent = "Busy..."; this.busyIndicator.IsBusy = false; MessageBox.Show(e.Error.ToString()); return; } //Load your data here and assign the result to the CollectionViewSource. var partViewSource = (CollectionViewSource)this.Resources["jobHeadViewSource"]; partViewSource.Source = e.Result; this.busyIndicator.BusyContent = "Busy..."; this.busyIndicator.IsBusy = false; }