private async void Handle_GetStockInfo(object sender, EventArgs e)
{
float max_value = float.MinValue; // max is 0.000
float min_value = float.MaxValue; // min is Highest value of float
GetData.flag = false;
// for parsing the TimeSeriesData
List <ParsedDayData> dataList = new List <ParsedDayData>();
//Enetered stock name
string selection = stockName.Text;
string key = "L0DPQVDUEO0WGBV";
HttpClient client = new HttpClient();
var response = await client.GetStringAsync("https://www.alphavantage.co/query?" +
"function=TIME_SERIES_DAILY&symbol=" + selection + "&apikey=" + key);
var stock = TimeDaily.FromJson(response);
//check for valid stock name. If invalid stock name then nofify user
try
{
GetData.dailyStockList = stock.TimeSeriesDaily.Values.ToList();
GetData.stockDate = stock.TimeSeriesDaily.Keys.ToList();
// get data from the json into the list
int count = GetData.dailyStockList.Count;
ParsedDayData currentdate = new ParsedDayData();
//loop through the list
for (int i = 0; i < count; i++)
{
//Convert date to "Jan 22, 2019" format
DateTime dt = DateTime.Parse(GetData.stockDate[i]);
currentdate.Date = dt.ToString("MMM dd, yyyy");
//high_prc and low_prc are in float for checking with min_value and max_value
float high_prc = float.Parse(GetData.dailyStockList[i].The2High);
float low_prc = float.Parse(GetData.dailyStockList[i].The3Low);
//converting high_prc and low_prc to string
currentdate.High = "$" + high_prc.ToString();
currentdate.Low = "$" + low_prc.ToString();
float open_prc = float.Parse(GetData.dailyStockList[i].The4Close);
float close_prc = float.Parse(GetData.dailyStockList[i].The1Open);
currentdate.Close = "$" + open_prc.ToString();
currentdate.Open = "$" + close_prc;
/*Find the Highest and Lowest for the entered stock */
if (high_prc > max_value)
{
max_value = high_prc;
}
if (low_prc < min_value)
{
min_value = low_prc;
}
dataList.Add(currentdate);
currentdate = new ParsedDayData();
GetData.flag = true;
}
/*Display the data on screen*/
StockListView.ItemsSource = dataList;
Highest.Text = "$" + max_value.ToString();
Lowest.Text = "$" + min_value.ToString();
}
catch (NullReferenceException)
{
InitializeComponent();
GetData.flag = false;
await DisplayAlert(selection + ":Invalid stock Name", "Please Enter valid stock Name", "Ok");
}
}
public static string ToJson(this TimeDaily self) => JsonConvert.SerializeObject(self, Midterm.Converter.Settings);