我正在学习将 Rx 扩展用于我正在开发的 Silverlight 4 应用程序。我创建了一个示例应用程序来确定该过程,但我无法让它返回任何东西。这是主要代码:
private IObservable<Location> GetGPSCoordinates(string Address1)
{
var gsc = new GeocodeServiceClient("BasicHttpBinding_IGeocodeService") as IGeocodeService;
Location returnLocation = new Location();
GeocodeResponse gcResp = new GeocodeResponse();
GeocodeRequest gcr = new GeocodeRequest();
gcr.Credentials = new Credentials();
gcr.Credentials.ApplicationId = APP_ID2;
gcr.Query = Address1;
var myFunc = Observable.FromAsyncPattern<GeocodeRequest, GeocodeResponse>(gsc.BeginGeocode, gsc.EndGeocode);
gcResp = myFunc(gcr) as GeocodeResponse;
if (gcResp.Results.Count > 0 && gcResp.Results[0].Locations.Count > 0)
{
returnLocation = gcResp.Results[0].Locations[0];
}
return returnLocation as IObservable<Location>;
}
gcResp 返回为空。任何想法或建议将不胜感激。