/// <summary>
/// 构造函数
/// </summary>
/// <param name="CityName"></param>
public Forecast(string CityName)
{
City = CityName;
ForecastList = new ObservableCollection <ForecastPeriod>();
TodayForecast = new ForecastPeriod();
}
public Forecast()
{
City = "成都";
ForecastList = new ObservableCollection <ForecastPeriod>();
TodayForecast = new ForecastPeriod();
}
/// <summary>
/// 异步获取天气预报
/// </summary>
/// <returns></returns>
private async void getForecastAsync()
{
Vis = Visibility.Visible;
ObservableCollection <ForecastPeriod> newForecastList = new ObservableCollection <ForecastPeriod>();
Uri uri = new Uri("http://api.map.baidu.com/telematics/v3/weather?location=" + City + "&output=xml&ak=HyXsPscHkQOfR0nxyUmYrV8l&date=" + System.DateTime.Now.ToString());
HttpClient httpClient = new HttpClient();
HttpResponseMessage response = await httpClient.GetAsync(uri);
response.EnsureSuccessStatusCode();
Stream stream = await response.Content.ReadAsStreamAsync();
XElement now = XElement.Load(stream);
httpClient.Dispose();
if (now.Element("status").Value.Equals("success"))
{
forecastSuccess = true;
now = now.Element("results").Element("weather_data").Element("date");
ForecastPeriod newForecastPeriod = new ForecastPeriod();
while (now != null)
{
string nowName = now.Name.LocalName;
if (nowName.Equals("date"))
{
string tmp = now.Value;
if (tmp.Length > 2)
{
newForecastPeriod.Date = tmp.Substring(0, 2);
int p = -1;
for (int i = 0; i < tmp.Length; i++)
{
if (tmp[i] == '：')
{
p = i; break;
}
}
CurrentTemperature = tmp.Substring(p + 1, tmp.Length - p - 2);
}
else
{
newForecastPeriod.Date = now.Value;
}
}
else if (nowName.Equals("dayPictureUrl"))
{
newForecastPeriod.DayPictureUrl = now.Value;
}
else if (nowName.Equals("weather"))
{
newForecastPeriod.Weather = now.Value;
}
else if (nowName.Equals("wind"))
{
newForecastPeriod.Wind = now.Value;
}
else if (nowName.Equals("temperature"))
{
newForecastPeriod.Temperature = now.Value;
newForecastList.Add(newForecastPeriod);
newForecastPeriod = new ForecastPeriod();
}
now = (XElement)now.NextNode;
}
TodayForecast.Weather = newForecastList[0].Weather;
TodayForecast.Wind = newForecastList[0].Wind;
TodayForecast.MaxTemperature = newForecastList[0].MaxTemperature;
TodayForecast.MinTemperature = newForecastList[0].MinTemperature;
foreach (ForecastPeriod forecastPeriod in newForecastList)
{
ForecastList.Add(forecastPeriod);
}
}
else
{
forecastSuccess = false;
}
Vis = Visibility.Collapsed;
}