嗨,为什么我得到一个inalid演员异常?无效的演员异常,JSON,Windows手机
public class RootContainer2
{
[DataMember]
public string StopName { get; set; }
[DataMember]
public string StopId { get; set; }
[DataMember]
public string Stop { get; set; }
[DataMember]
public ObservableCollection<Stops> Stops { get; set; }
}
private void ContentPanel_Loaded(object sender, RoutedEventArgs e)
{
textRouteId.Text = this.NavigationContext.QueryString["name"];
string myvar = textRouteId.Text;
try
{
WebClient webClient = new WebClient();
Uri uri = new Uri("websiteurl");
webClient.OpenReadCompleted += new OpenReadCompletedEventHandler(webClient_OpenReadCompleted);
webClient.OpenReadAsync(uri);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
void webClient_OpenReadCompleted(object sender, OpenReadCompletedEventArgs e)
{
DataContractJsonSerializer ser = null;
try
{
ser = new DataContractJsonSerializer(typeof(RootContainer2));
RootContainer2 rootContainer = ser.ReadObject(e.Result) as RootContainer2;
foreach (Stops em in rootContainer.Stops)
{
string df = em.StopName;
string dt = em.StopId;
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
这是我试图读取的json输出,但我得到一个无效的转换异常。
{"RouteId": "1231", "RouteName":"1 Whitehawk - Mile Oak", "Stops": [ { "StopId":"6882", "StopName":"Swanborough Drive", "OperatorsCode4":"bridmpj", "Lat":"50.8326729229821", "Lng":"-0.103217996656901" } , { "StopId":"6883", "StopName":"Haybourne Road", "OperatorsCode4":"brimapm", "Lat":"50.8317788816436", "Lng":"-0.10486427645364671" } , { "StopId":"6884", "StopName":"Coolham Drive", "OperatorsCode4":"brijtwm", "Lat":"50.829695439856089", "Lng":"-0.10512229365031489" } , { "StopId":"6885", "StopName":"St Cuthmans Church", "OperatorsCode4":"briapdg", "Lat":"50.8283233642578", "Lng":"-0.104808002710342" } ,
加上stops.cs类:
public class Stops
{
public string StopId { get; set; }
public string StopName { get; set; }
}
编辑:
所以创造我自己的URL,然后测试数据后,它的东西做,我是URL给我想。只是做进一步的测试。
编辑2
如果我把数据转换成文本文件和调试数据,它的工作原理,如果我做到以下几点。
在进料结束时是这样的:
“LNG”: “ - 0.277833998203278”, “”}]}
如果我删除,和 “”,那么它的工作原理。但我该如何阻止它首先到达那里?
异常的*细节*是什么? – 2012-04-02 10:51:41
当我调试它时,当它到达这一行的末尾: RootContainer2 rootContainer = ser.ReadObject(e.Result)as RootContainer2; 它直接结束并显示错误消息,它只是 “InvalidCastException” – 2012-04-02 11:28:21
这是因为您只显示异常的*消息*。您应该能够获得比这更多的信息,例如堆栈跟踪。 – 2012-04-02 11:35:20