public void Stop()
{
if (cts == null)
{
return;
}
cts.Cancel();
Status = ProviderStatusEnum.Idle;
cts = null;
}
public void Start()
{
if (string.IsNullOrEmpty(city) || string.IsNullOrEmpty(key))
{
return;
}
Stop();
cts = new CancellationTokenSource();
Task.Factory.StartNew(async() =>
{
TimeSpan delay = TimeSpan.FromMinutes(10);
var token = cts.Token;
try
{
while (true)
{
token.ThrowIfCancellationRequested();
string url = string.Format(serviceAPI, key, city);
var data = await loadData(url);//load forcast
if (data.Status != ProviderStatusEnum.NA)
{
forcast = data;
}
url = string.Format(serviceAPI_Current, key, city);
data = await loadData(url);//load current weather
if (data.Status != ProviderStatusEnum.NA)
{
current = data;
}
await Task.Delay(delay, token);
}
}
catch (OperationCanceledException)
{
System.Diagnostics.Debug.WriteLine("Xinzhi Weather operation canceled");
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex.ToString());
}
}, cts.Token
);
Status = ProviderStatusEnum.Ready;
}
public XinzhiWeatherForcast(string key, string defaultCity)
{
city = defaultCity;
this.key = key;
Status = ProviderStatusEnum.Idle;
}