[英]GeoCoordinate System.FormatException
I have a viewmodel which contains a System.Device.Location.GeoCoordinate property which is marked as [DataMember] like so: 我有一个包含System.Device.Location.GeoCoordinate属性的视图模型,该属性被标记为[DataMember],如下所示:
[DataMember]
public GeoCoordinate Location
{
get
{
return _location;
}
set
{
if (_location != value)
{
_location = value;
NotifyPropertyChanged("Location");
}
}
}
I have a collection of a this viewmodel, and for every item of the collection I am getting: 我有一个此viewmodel的集合,对于集合的每个项目,我都会得到:
A first chance exception of type 'System.FormatException' occurred in mscorlib.dll
mscorlib.dll中发生类型为'System.FormatException'的第一次机会异常
The interesting part is that this only occurs when I am navigating back, but somewhere before OnNavigatedTo event fires. 有趣的是,这仅在我向后导航时发生,而在OnNavigatedTo事件触发之前的某处。
Is this a known issue? 这是一个已知的问题? how can I fix it?
我该如何解决?
Are you sure GeoCoordinate
is serializable by the DataContractSerializer
? 您确定
GeoCoordinate
可通过DataContractSerializer
序列化吗?
Try to build a custom GeoCoordinate
type: write a simple class with two double latitude/longitude properties, a BuildFromGeoCoordinate()
and a ToGeoCoordinate()
method to convert from/to GeoCoordinate
, and check if the error still happens. 尝试构建自定义的
GeoCoordinate
类型:编写一个具有两个双纬度/经度属性的简单类,一个BuildFromGeoCoordinate()
和ToGeoCoordinate()
方法,以从/ GeoCoordinate
到GeoCoordinate
,并检查是否仍然发生错误。
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