我正在尝试从我创建的 Uri 中读取并将其显示在 Windows Phone 7 应用程序上。（我正在做这个教程：http: //msdn.microsoft.com/en-us/windowsmobile/Video/hh237494）。
我的问题是程序没有进入 OpenReadCompletedEventHandler，我不知道为什么。（我为了调试而放置了消息框，我发现程序没有进入 OpenReadCompletedEventHandler）。以下是相关代码：
void myButton_Click(object sender, RoutedEventArgs e)
{
try
{
WebClient webClient = new WebClient();
Uri uri = new Uri("http://localhost:44705/Service1.svc/GetAllBrands");
webClient.OpenReadCompleted += new OpenReadCompletedEventHandler(webClient_OpenReadCompleted);
try
{
webClient.OpenWriteAsync(uri);
MessageBox.Show("opening sucsseded");
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
void webClient_OpenReadCompleted(object sender, OpenReadCompletedEventArgs e)
{
MessageBox.Show("OpenRead Handler");
// OpenWriteCompletedEventArgs temp = (OpenWriteCompletedEventArgs)e;
DataContractJsonSerializer serializer = null;
try
{
serializer = new DataContractJsonSerializer(typeof(ObservableCollection<Brand>));
ObservableCollection<Brand> Brands = serializer.ReadObject(e.Result) as ObservableCollection<Brand>;
foreach (Brand b in Brands)
{
int id = b.BrandId;
string name = b.BrandName;
listBrands.Items.Add(id + " " + name);
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
提前致谢！