public async Task ProcessRates()
{
client.DefaultRequestHeaders.Accept.Clear();
client.DefaultRequestHeaders.Accept.Add(
new MediaTypeWithQualityHeaderValue("application/json"));
//client.DefaultRequestHeaders.Add("User-Agent", ".NET Foundation Repository Reporter");
var serializer = new DataContractJsonSerializer(typeof(List <RatesJSON>));
var streamTask = client.GetStreamAsync("http://quiet-stone-2094.herokuapp.com/rates.json");
var repositories = serializer.ReadObject(await streamTask) as List <RatesJSON>;
using (var context = new GNBContext())
{
foreach (var trans in context.Rates)
{
context.Remove(trans);
}
context.SaveChanges();
foreach (var trans in repositories)
{
var row = new Rates {
Id = 0, FromCurr = trans.from, ToCurr = trans.to, Rate = trans.Rate
};
context.Add(row);
}
context.SaveChanges();
}
}
public async Task CompleteRateTable()
{
using (var context = new GNBContext())
{
string sqlstring = "SELECT pair.Id, pair.FromCurr, pair.ToCurr, pair.rate " +
"FROM " +
"( SELECT f.id Id,f.FromCurr FromCurr , t.FromCurr ToCurr, (f.rate/t.rate) rate " +
" FROM dbo.rates f, dbo.rates t " +
" WHERE " +
" f.ToCurr = t.ToCurr " +
") pair " +
"LEFT OUTER JOIN rates " +
"ON " +
"pair.FromCurr = rates.FromCurr " +
"AND pair.ToCurr = rates.ToCurr " +
"WHERE rates.FromCurr IS NULL " +
"and pair.rate<>1";
var result = context.Rates.FromSql(sqlstring).ToList();
foreach (Rates trans in result)
{
var row = new Rates {
Id = 0, FromCurr = trans.FromCurr, ToCurr = trans.ToCurr, Rate = Decimal.Round(trans.Rate, 2)
};
context.Add(row);
}
context.SaveChanges();
}
}
